Factual error: Brian Wilson's panic attack on the airplane takes place circa 1964. However, the interior of the plane had distinctive sculpted doors on the overhead bins, a style first introduced in 1983 on the Boeing 757.
Factual error: In the Logan departure scene near the end of the movie, Logan's naval officer uniform is missing his rank shoulder boards.
Factual error: The helicopter flown is a Bell 407. The movie is set in '88 and the first flight of this type was 1994.
Factual error: About 20 minutes in, the group find a Welsh miners' group in the phone book. The character who is making the call speaks the first two digits of the phone number: "0, 1,..." The movie is set in 1984, when the dialling code for that district was "0639" In that year, "01" was the code for London, not Wales.
Factual error: Writer/director Adam MacDonald boasted that he studied black bear predatory behavior and black bear attacks on humans for years in preparation for making this film, because he wanted to depict a black bear attack in as factual and as authentic a manner as possible. But, at the most crucial point in this film (when the black bear actually does attack Alex and Jenn), factual accuracy goes out the window. As Alex and Jenn cower in terror, the bear lunges into their tent and bites into Alex's leg; whereupon, Jenn fires a can of bear spray (a stifling pepper-based chemical) point-blank into the animal's face. The startled bear retreats for a moment, but then lunges into the tent again, dragging Alex outside and killing him; thereafter, the bear continues pursuing Jenn for the remainder of the film. However, according to years of extensive study by the University of Calgary, no bear has ever attacked a human after the animal was sprayed with bear spray, much less resumed an attack, as depicted in this film. To date, the success rate of defensive bear spray is 100%. So, the factual accuracy of "Backcountry" was abandoned for the sake of cheap thrills.
Factual error: The film makes use of a real Broadway theater, the St. James, which is on West 44th St. When they leave the stage door, the actors are next to the Edison Hotel, which is on 47th St.
Factual error: The concierge in 1968 rushes to help a guest who is choking. The scene depicts him performing the Heimlich Maneuver. It was not introduced until the 1980's.
Factual error: They travel on a Boeing 777 to Amsterdam. The shots in the airplane are in a much smaller cabin (3 seats/aisle/3 seats). The 777 seating in economy class is 9 or 10 seats across, with two aisles. (01:29:00 - 01:30:00)
Factual error: The scene in front of the Sphinx shows the Sphinx without a nose. The nose was not missing until much later - most likely due to vandalism in AD 1378. (The story about Napoleon's soldiers shooting it off is untrue - sketches made in 1738 and published in 1757 show the nose was already missing, long before Napoleon's time).
Factual error: In the third scene, where the woman is being dragged away, you can see the incisions from breast enlargement surgery at the bottom of her breasts, hardly fitting the time period. (00:01:25)
Factual error: Though Maverick describes the helicopter he flies when he picks up the Mustang in Utah as an Apache, it is not one. The Apache is an attack helicopter, while the one flown is a cargo model discontinued in the 1970s. Furthermore, the livery of the aircraft has not been used by the Army for decades. Further still, the jets which intercept Maverick fly so close to the helicopter that their wake turbulence should have caused it to crash. A really heinous scene overall.
Factual error: During the Hungnam evacuation scene in December 1950, a U.S. Army Captain is using a radio handset. The model he uses is the H-250, which was introduced in 1987, over 30 years after the Korean War.
Factual error: Declan takes a gun from his glove compartment and nothing else. I counted that he fired 22 shots before being put down. There is no way that gun had a 22+ round magazine.
Factual error: The "Italian" police wear obvious fake uniforms, they're US style.
Factual error: In the scene where James Brown receives a new Cadillac from his manager, the scene is marked by a 1965 timeline header, but the Cadillac is actually a 1967 model.
Factual error: In a scene where Kat is flying to or from Northern California for college, in the background through the window on the plane one can see a commercial jet which has the winglets of a narrow-body Boeing, which were not introduced until 1998 on the Boeing 737 NextGen, rather than "wingtip fences" of an Airbus which were in use as early as 1985. Eve disappeared in 1988 when Kat was 17, so this would have been 1993 at the latest, when Kat would have been expected to have graduated from Berkeley. In the movie, it is suggested that this was just 2 years after her mother disappeared, so this would have been not later than 1990-91.
Factual error: As the marchers start through the streets before they gather at the Edmund Pettis Bridge, they pass by a shop with a Pepsi sign. The Pepsi logo, however, is from the 1980s-1990s.
Factual error: In the scene in the basement during the storm Dale is running the projector on house electricity. The lights go out and he switches to a battery which must be 12 volt. He runs the projector on that current, which is impossible.
Factual error: The three panzers that ambushed the Hellcats are supposed to be Mk. III's with the 50mm gun, but they only had 5 bogie wheels, instead of 6, and no driver or radio operator's hatches.
Factual error: Roland enters the train to go to the war, in 1914, with "Spanish Flu", but that was the (wrong) name given to the 1918 flu pandemic, which lasted from spring 1918 through spring or early summer 1919.