Factual error: In the last scene the ICE Train is leaving the station eastbound. It is not possible to enter these trains at the central station because all eastbound trains end in Berlin and have only one station left (Berlin Ostbahnhof). Every ICE leaving Berlin is going in the other (westbound) direction.
Factual error: When Robert Kennedy receives news about his brother John's assassination, he is in his office at the Department of Justice. RFK was actually at home eating lunch when he received that phone call.
Factual error: During scenes set in the early Noughties (one of Dex and Emma talking on a rooftop at night, and another of Dex crossing the river on a bus), modern buildings are shown on the skyline, including the Heron Tower (2009), the tallest building in the City at the time of filming, but it didn't exist at the time the scene is set.
Factual error: Julia Roberts character orders Pizza and Wings, gives the driver one bill (guessing it's a $20). Says she's giving a $12 tip. No way Pizza and Wings costs $8, certainly not in California.
Factual error: While Hadrian's Wall itself is accurately depicted, its use and meaning to the Romans is not. The Wall did not demarcate a line north of which no Romans soldier would venture out of fear of the locals. The area north of the wall was too sparsely populated to produce a serious threat to a sizable Roman force and the Romans would have regularly patrolled there. In fact just two years after the events in the movie are set, the Romans constructed the Antonine Wall 60 miles north of Hadrian's Wall, running approximately between today's Glasgow and Edinburgh. The plot more closely matches the experience of the Romans in Germania in AD9 when three Roman legions were wiped out in the Teutoburg Forest. The Romans went to great lengths to recover the Eagles lost in this defeat and did so through a combination of diplomacy and military successes.
Factual error: The scene showing Paris at night displays heavy traffic and bright car headlights over the distance. Both were not possible to be seen at time the story occurs, circa 1920's.
Factual error: When Benjamin's brother arrives in his car with the bear's fish, he opens the trunk with a remote key. The car is a Mercedes 240 Diesel (to be more precise, a W123 series), built from 1975 to 1986. Mercedes first introduced a remote key system to the W140 series at the beginning of the nineties. (01:35:45)
Factual error: Driveway cut outs with tapered edges were not extant during the time period of this film.
Factual error: The car doors wouldn't protect Adam and the other police officers from being shot - they offer no protection against bullets.
Factual error: In the medicine cabinet, when Margaret is emptying it, a box of Rite-Aid Bandages is visible. Rite-Aid is an American chain of drug stores, not in the UK. And the Brits call the product plasters.
Factual error: Josh abseils forwards into the cave and in the next shot is seen coming alongside Victoria, in the standard seated abseil position. This would not have been possible, due to the design of his harness, without moving his abseil device from his back to his front. This would have involved him removing the device completely and then re-attaching it to the front of his harness which would be impossible during descent. (00:15:20)
Factual error: When Andy is headed to Mr. Simon's house, a white 90s Lincoln Town Car can been seen in the background, out of place for the 1965 setting. (01:31:45)
Factual error: When Mitch Albom is with Rabbi Albert Lewis in his rabbinical office/study they discuss an empty folder on the rabbi's bookcase labeled "God". Religious Jews as this rabbi was, know not to spell out the deity's name, but write it as "G-d" instead.
Factual error: Early on the in the movie the period is set in 1960. Danny Green is in a bar with his co-workers drinking Pabst Blue Ribbon beer where a UPC code is visible on one of the bottles. UPC weren't put to use until 1974-1975.
Factual error: The young priest sees images of a red-eyed horse, but later, it is referred to as a mule, which looks much more like a donkey.