Continuity: When Charley Butts first gets to Alcatraz he is inside his cell and introduces himself to Frank Morris. According to the camera angle, Charley's cell is on the right and Frank's cell is on the left. Later on, it's like they switched cells. Frank's cell is to the right and Charley's cell is to the left. But later their cells are back in their original positions. Video only.

Visible crew/equipment: In the non-widescreen version, a hole in the ceiling and a microphone can be seen picking up the dialogue between Patrick McGoohan and Clint Eastwood in the warden's office.

Continuity: In the scene where Charlie Butts 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.