June Havens finds her everyday life tangled with that of a secret agent who has realized he isn't supposed to survive his latest mission. As their campaign to stay alive stretches across the globe, they soon learn that all they can count on is each other.
Knight and Day follows the adventures of Roy Miller (Tom Cruise), a rogue spy, and June Havens (Cameron Diaz), a car restorer. We see Miller watching Havens, and he bumps into her a couple of times as they go through security at Wichita Airport. Havens is making her way back home to Boston from Wichita after picking up spare parts for her deceased father's classic GTO car, which she is restoring for her sister as a wedding gift. Even though she has a confirmed reservation for her flight, she is told at the gate that it is overbooked. Miller is able to board, whispers to her that she is better off taking the next flight. Unbeknownst to Havens, FBI Special Agent Fitzgerald (Peter Saarsgard) is monitoring Miller's movements and, believing she is working with Miller, puts her back on the flight list.
On board the flight, Havens notices that there are only 4 or 5 other people present. She relaxes with a drink, and Miller chats about his dream of someday driving to Cape Horn while he checks out the other passengers. She is charmed, and goes to the restroom to freshen up. While she is occupied, Miller is attacked by the remaining passengers and crew. All are dispensed, including the pilots. After she emerges from the restroom Miller calmly informs her that everyone onboard is dead. Thinking that he is joking, Havens plays along until Miller enters the cockpit. In a spell of turbulence, she notices the dead bodies falling over in their seats, and spilling onto the aisle. Miller lands the plane on a highway, but skids off the end of the road into a corn field. Miller gives Havens a drink, and explains that she may be questioned by various officials. She is not to get in any vehicle with them, nor accompany them if they suggest taking her away to a "safe" place. Havens passes out due to a knock-out drug in the drink, but awakes at home amongst clues that Miller brought her there, ensuring her safety.
Havens struggles through the day trying on bridesmaid dresses for her sister, April's (Maggie Grace) wedding. Talking over what to do with their dad's GTO car Havens is shocked to learn that April wants to sell it. She is lured out of the shop and is accosted by a group of intelligence agents who, with assurances that she will be safe, drive her away. She is shown some files pertaining to Miller, and is questioned by the agents to determine if she is working with him. Suddenly, Miller shows up, and with much shooting and acrobatics, "rescues" Havens.
Havens doesn't know who or what to believe and flees to the firehall, where her former boyfriend, Rodney (Marc Blucas), works as a firefighter. Upon hearing her story he thinks she is merely stressed from the wedding, and takes her out for pie. While they are chatting, Miller arrives and kidnaps Havens. He handcuffs her and shoots Rodney in the leg, telling him this will all turn him into an overnight hero and virtually guarantee his desired promotion to lieutenant.
Miller explains that Havens is safer with him; and Havens agrees to follow him as they go to pick up Simon Feck (Paul Dano), a genius inventor who created a perpetual energy battery called the Zephyr. Miller arrives at his safe house in New York City where he left Feck. He is missing, but has left clues that he can be found on a train in Austria. The two are immediately ambushed by men belonging to Antonio (Jordi Mollà), a Spanish arms dealer. After Miller again drugs Havens, she drifts in and out of consciousness between their capture and escape from Antonio's men. Miller brings her to an island that is off the grid, which he calls his home. After leaving Miller in frustration to wander the island, Havens notices a message on Miller's cell phone with a Boston address. While studying this, her cell phone rings, showing her sister's caller ID. In answering the phone, she accidentally leads Antonio's group to the hideaway. They try to kill Miller and Havens with a remote drone.
Again knocking out Havens, Miller transports them to a train heading through the Alps. Havens awakes alone and, missing a message from Miller, leaves to get breakfast in the dining car where she encounters Danny (Rich Manley), a German assassin. When she looks at the message, she realizes that Feck is with Miller, and Danny is someone else. Using tricks learned from Miller, Havens manages to survive, and Danny is eventually knocked out of a window by Miller and presumedly killed by a train coming from the opposite direction.
Miller puts Havens and Feck up in a hotel in Salzburg, and heads to a meeting with a mysterious beautiful woman. Havens follows him, and hears him make a deal to sell the Zepher to Antonio. Havens is picked up by the CIA and meets the director of counter-intel, who confirms that Miller is a rogue agent, and gives her a pen to signal them when she is with Miller and the Zepher. Miller meets her back at the hotel, and shows her the Zephyr, which is now showing signs of overheating. Havens uses a pen transmitter to notify the agents, but Miller escapes to the roof-tops. After leading the CIA agents on a chase, Miller is apparently shot and falls into a canal.
Havens is sent home by the agents in time to stand at her sister's wedding. When Havens hears the song that Miller used as his ring-tone, she heads to the address she remembered from his iPhone. She meets the people at the address, and realizes that they are Miller's parents. She learns that Miller's real name is Matthew Knight. They believe their son, a former Army sergeant and Eagle Scout, is dead; but they are fabulously wealthy from winning lotteries and sweepstakes they don't remember entering.
Havens leaves the Knights', and calls her own voice mail, leaving a message that she has the Zephyr. She is quickly captured by Antonio's men and taken back to Spain. She is drugged with truth serum, which makes her relaxed and happy. Antonio realizes that she doesn't have the Zephyr, and the only way he can get the device is to pay Fitzgerald who has kidnapped Feck. Miller has been following Feck using a tracking app on his iPhone, and stumbles upon Havens in the Spaniard's compound. Havens is rescued as she is being taken out for execution. They pursue Fitzgerald and Feck on a motorcycle, while eluding Antonio's men during the Running of the Bulls.
Fitzgerald is able to escape in an amphibious plane with the now extremely hot Zephyr while Miller is grazed by a bullet as he saves Feck. Feck comments that the battery is unstable. As they watch the plane climb, the battery explodes, killing Fitzgerald.
Miller collapses from the gunshot wound, but wakes in a hospital. He receives an apology from the director (Viola Davis), who tells him that he routed out a corrupt team. He asks about Havens, and is told that she has returned home. He is warned that he can't be distracted, and must forget her to continue with his job. The Director also explains to Miller that the Agency will "Transfer you to a secure facility tomorrow, for your safety" using the same wording that he warned Havens about. As they leave, a nurse enters, and gives Miller his medication. Miller realizes that he's been drugged, but then sees that the nurse is Havens.
Miller comes to in the rebuilt classic car that belonged to Havens' father. After he asks what day it is, Havens kisses him and says it's "someday." She drives off, traveling along a coastal road past a signpost for Cape Horn. The final scene shows Roy's mom telling her husband that they have just received two tickets to Cape Horn. Though she blames her husband for ordering them by mistake, she insists that they go.
Revealing Mistakes During the warehouse battle, June fires a fully automatic machine gun often and repeatedly. After a particularly long firing, Roy grabs the machine gun's barrel near the business end, and holds it for about a minute while talking calmly. The gun barrel should have been too hot to touch.
Revealing Mistakes After June gets off the bus in Boston, leaving Roy on, in one shot, all of the writing on the overhead advertisements are in mirror image.
Revealing Mistakes While the interiors of the plane were shot in a McDonnell Douglas MD-8x mock-up, the plane wreckage in the cornfield is clearly that of a Boeing 727 "Whisperjet," which are no longer used, therefore cheaper to buy for use as wreckage.
Revealing Mistakes When at the boarding gate at the beginning of the film, see the 727 parked outside has no windows on it. It is a freight plane.
Revealing Mistakes June Havens (Cameron Diaz) wears a Rolex Submariner Date in the film. But her stunt double wears a Rolex Sea Dweller Deep Sea. They look almost identical, but the SDDS is much thicker as it's designed to go to much greater depths underwater, and has no magnifier over the date window.
Crew/Equipment Visible When Roy kidnaps June in the diner, a cameraman is visible in the right corner.
Crew/Equipment Visible During the chase scene, when June is riding on the motorcycle behind Roy, a box-like bulge is clearly visible on her lower back, beneath her blouse. It's probably a wireless mic box.
Crew/Equipment Visible After the train scene when June is in the hotel room a crew member is visible in the mirror above the bed.
Errors in Geography When June is taken to Antonio's home in Seville, Spain, the city is celebrating the festival of San Fermin. Part of that is the famous running of the bulls, which happens in Pamplona, not Seville. Pamplona is in northern Spain; Seville is in southern Spain.
Errors in Geography Towards the end of the movie, a sign on the beach lists the distance in miles to Santiago and Cape Horn. In South America, distances would be listed in kilometers. The distance to Santiago is shown as "1279", implying that they are somewhere near Antofagasta, Chile, a Spanish-speaking country. Therefore, the sign should not say "Cape Horn" (English name), but "Cabo de Hornos" (Spanish name) instead.
Errors in Geography Knight's "tropical island" refuge is in the Azores, which are nowhere near the tropics.
Errors in Geography The pier with the amphibious plane is in Southern Spain. As the scene opens, the Queen Mary and Long Beach Cruise Terminal are visible. The catamarans in the background appear to be ferries that run to Catalina Island.
Errors in Geography When June leaves the message for the agents to deliver the battery, she says she is on Route 28, just outside New Hampshire. She meets them on a rural, tree-lined road. Route 28 is a busy thoroughfare, lined with plazas and businesses for miles, on either side of the New Hampshire border.
Errors in Geography When bodies are removed from the train at the Austrian station, "Coroner" is on the forensic team's coats. Austria's official language is German, so the coats should say "Leichenbeschauer".
Errors in Geography San Fermín (Saint Firmin's day) is not celebrated in Seville. It is a local holiday in Pamplona only.
Errors in Geography The end of the car chase in Sevilla Spain winds up at a dock where Fritz and Simon are about to get in an airplane. It is clearly filmed at the dock for the Catalina Island Express Cruises in Long Beach, CA,with the Queen Mary clearly visible in the background.
Errors in Geography At least some of the "Salzburg, Austria" scenes were filmed in Seville, Spain. In one scene even a "Sevilla" sign could be seen in the background.
Errors in Geography It is impossible to arrive to Cape Horn by car. Cape Horn is actually an island (Hornos), under Chilean sovereignty, seventy kilometers away from Navarino Island, last point where you can find both a car and a route.
Errors in Geography During the car ride in Schwedelbach,Germany a sign can be seen which gives directions to Hamburg. On the sign it says 821km. The actual distance from Schwedelbach to Hamburg is just about 690km.
Factual Mistake When the spy planes start bombing Roy's private island, June grabs her purse, which contains her and Roy's cell phones, and they dive into the ocean to escape. In the next scene, she received a call on her cell phone, which should have been ruined after being immersed in seawater.
Factual Mistake The locomotive in the film is described as a diesel hydraulic, but it's clearly an electric locomotive.
Factual Mistake The 1966 Pontiac GTO has two green style Massachusetts license plates, front and rear. This model of plate had no front issue.
Factual Mistake The bad guy is walking with June through the garden as his henchmen continue to disappear. When he realizes they are gone; he points the gun at June. But the gun he points is empty; the slide is obviously back.
Factual Mistake While on the train, June comments after her phone rings that she cannot answer since that would allow it to be tracked. Cell phones when on are constantly transmitting and receiving radio signals, so it could be tracked as it was depicted.
Revealing Mistakes When Roy drops the battery in the ice to cool it, it starts hissing and smoking, implying that the thing is very hot. However only a few seconds earlier he had it in his bare hands.
Audio/Video Mismatch When Antonio is yelling in the phone during the car chase, he is saying something in English and yet the audio is in Spanish.
Audio/Video Mismatch The engine sound of the plane at liftoff is for a prop or turbo-prop, but the plane shown is a jet.
Audio/Video Mismatch When in Salzburg Austria, the sound of the siren from the police cars are wrong. The sound used is close to Austrian ambulance cars.
Character Error When we first see Simon in the cab of the locomotive in Austria, he mentions the engine can haul 50,000 metric tons. This equals 55,000 tons in U.S. measurement. A coal train (for example) weighing 55,000 tons would be upwards of 5½ miles long with 20 or more modern locomotives - virtually impossible across even the Australian Outback, let alone the Austrian Alps.
Character Error When Roy is flying the plane he issues a mayday call to ATC, he uses the suffix "heavy" with the call-sign of the plane. "Heavy" is given with the call-sign to denote an aircraft with a maximum take off weight above 255,000 lbs which is not true of either the Boeing 727 or Airbus A320.
Character Error June is told that the 1970 Pontiac Grand Prix has the "longest hood ever made." That is true of the 1970-72 models, but the car pictured is a 1969 model.
Character Error June, a Massachusetts resident, tells Rodney that Roy rescued her on "the I-93." Identifying numbered highways as "the" is a California colloquialism. A Massachusetts resident would say "I-93" or "93."
Character Error Miller describes the Zephyr battery as "the first perpetual energy source since the Sun", however the Sun is not a perpetual energy source. Powered by the fusion of hydrogen nuclei into helium, the Sun will eventually use up its raw materials and die.
Continuity You see the agent arrive in Spain behind the street festival. Behind him are 2 silver and 1 black SMART cars. Four minutes later he meets Antonio and he leaves the HQ of Antonio. Here are these 3 SMART cars again.
Continuity When June follows Roy from the hotel to the meeting, and Director George and Fitzgerald interrogate her, it is clearly daytime outside one of the windows.
Continuity Roy and June take off in an Airbus A320, which turns into a Boeing 727 until the explosion.
Continuity When June tails Roy in Salzburg, her hair becomes layered and wavy.
Continuity Frank Knight, played by Dale Dye, is listed as Frank Jenkins in the movie credits (and in the IMDb cast and crew listing).
Continuity When Roy is driving June in the Volvo after shooting Rodney, he enters a parking building, and when on the top floor he slides the car to align perfectly in a parking space. In the next scene the car isn't aligned and some parking spaces that were not there previously appear as well as some tire tracks.
Continuity When June is sitting tied up at Antonio's place, Antonio is wearing a groomed beard while in the "car chase scene" right afterward (on the same day) he's got a three-day-stubble.
Continuity When June goes up the escalator at the airport, just before she runs into Roy, the people behind her change from police to civilians and back again.
Tom Cruise and Cameron Diaz did a majority of the stunts on their own. Both Cruise and Diaz are avid drivers and have experience in doing sharp turns and 180's.
With the exception of Roy Miller falling off during the rooftop chase in Austria, Tom Cruise did most of the running and jumping without any wire works.
Tom Cruise wanted to do another spy thriller, but he thought Salt (2010) and The Tourist (2010) were too similar to his Mission: Impossible (1996) franchise. He ultimately chose this project once it became an espionage thriller with comic elements.
Tom Cruise dropped out of The Tourist (2010), which was being extensively rewritten by Christopher McQuarrie, to do this film.
The film's production partners, New Regency and Dune Entertainment, offset financing for the film by paying Tom Cruise a lower advance fee than he normally received. According to the Los Angeles Times, Cruise received $11 million for Knight and Day (2010), not the $20+ million he usually receives.
All the car crashes were recorded on studio lots and digitally imposed in the film.
When Roy is late and discovers Simon's hidden message in the shipping container, similarly-hidden messages reading 'URLATE' can briefly be seen on both sides of the container wall.
Chris Tucker, Adam Sandler, and Gerard Butler were all considered for the lead role before Tom Cruise signed on.
The car Cameron Diaz is driving in the chase scene is a 1966 Pontiac GTO with Martinique Bronze exterior and Parchment interior.
Over 12 writers worked on the film but the Writers Guild of America ruled that only one of them - Patrick O'Neill - should be credited. Some of the other uncredited writers were Scott Frank, Laeta Kalogridis, Ted Griffin, Dana Fox and Simon Kinberg.
On 9/15/2009, Cameron Diaz and Tom Cruise filmed a spot for The Jay Leno Show (2009) at the Worcester Regional Airport in Worcester, Massachusetts, which stood in for Wichita KS in the movie.
Tom Dey was the project's original director.
Eva Mendes was cast as the female lead when Chris Tucker was attached to the project.
There is a remake of this movie in Bollywood named "Bang Bang" starring Hrithik Roshan and Katrina Kaif.
Celia Weston, who plays the mother of Tom Cruise, is only 10 years older than him.
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