Deliberate mistake: When the inmates first leave their cells we see at least 2 that have white or light colored shirts on instead of prison blue.
Escape from Alcatraz (1979)
1 deliberate mistake
Directed by: Don Siegel
Starring: Clint Eastwood, Patrick McGoohan, Roberts Blossom, Jack Thibeau
Continuity mistake: In the scene where Frank Morris arrives at Alcatraz, he has to take all his clothes off for a routine check. When the guards escort him to his cell you can see him wearing a pair of white boxers, but in the next scene (still walking) he is naked again and when placed into his cell you can see him wearing a pair of pants. (00:06:15)
More trivia for Escape from Alcatraz
Question: When Frank is delivering books to inmates' cells, he reaches D block, but a guard stops him, and tells him they are not allowed in those cells. Were books really disallowed in D block cells?
Answer: Those were the solitary confinement cells, with no light and no luxuries of any kind. So yes, they did not allow inmates on that block to have books.
This is inaccurate as a light in each cell was turned on at 6:30 every morning in solitary confinement at Alcatraz.