Factual error: When Joe is first imprisoned in 1993 he's flicking through channels and passes a scene from Xena: Warrior Princess. Xena didn't air until 1995.
Oldboy (2013)
1 factual error
Directed by: Spike Lee
Starring: Samuel L. Jackson, Josh Brolin, Elizabeth Olsen, Sharlto Copley
Continuity mistake: During the ending, when Joe is seen burning one of the letters he had written Mia, when the camera cuts from a medium shot to the closeup of the letter burning, the handwriting on the envelope is slightly different, and the size/position of the fire has also changed.
Chaney: Shit, you might wanna think about what you're doing here.
Joe Doucett: I've been thinking about it for the last 20 years.
Trivia: The passing reference to "The Count of Monte Cristo" made right before Joe kills a guard at the "prison" is a small nod to the original Korean version of the film. "The Count of Monte Cristo" is referenced and paid homage to several times during the original film.