Continuity mistake: Willis drops his cap on the road when he runs away. It's still there in the long shot of him running, but after the commercial break we return to the same scene, and as Sam stands up, the cap is no longer on the road behind him.
Continuity mistake: After Sam refuses to sign the adoption papers, he's leaning forward with one hand to his mouth, talking to Mrs. Thailer. When the shot cuts to a wider angle, he's suddenly leaning back with both hands supporting his weight behind him.
Continuity mistake: When Sam is strapped into the electric chair, the huge clock on the wall behind him, which is there so that both the prison doctor and the reporters viewing the execution can mark the time of death, reads 7:00. The final scene runs for more than five minutes - after which the clock still reads 7:00.
00:37:15 - 00:42:00Jean G
Continuity mistake: As Sam is marched down the corridor to the electric chair, Raul reaches through the cell bars and begs him to confess. In long shots, Raul's arms are fully extended. But in close-ups, his arms are folded and wrapped around the bars.
Factual error: When Sam knocks on Diana's door, she opens it. But we've just been told that she's completely deaf, so there's no way she could have heard him knocking. Though she dances to "vibrations in the air," this is with music played at volumes high enough to cause such vibrations. Sam is absolutely not banging on her door that loudly.
Add timeJean G
Revealing mistake: Connie and Sam are talking in their room, while Sam is looking at his female self in the mirror. As Connie walks back into the shot, her shadow is cast on the wall behind the mirror. This indicates she came from the opposite direction that is possible in the reflection had this not been the mirror trick. In reality, she would have been coming from behind Sam, not from in front and wouldn't have cast a shadow on the wall with the mirror.
Revealing mistake: Just after Mrs. Stiner delivers the line "My car's out front" after her father's hearing, everyone except Al rushes away from the broken window. Sam brushes up against Al's shirt sleeve, causing it to move. Al, being a hologram, shouldn't have been touched.