Character mistake: The officers count the inmates and say there's 10 missing. There are indeed 10 inmates hiding in the pool. However, Pennsatucky and Chang had escaped the prison. The officers counted Linda as an inmate, who had been hiding in Litchfield the whole season, and wasn't on the list. That would make it 11 people missing, not 10.
Factual error: Tiffany asks a guard where he would go if he could travel back in time. He says he would return to 1999 to attend a Judas Priest concert he missed. He says he wasn't able to get close to Rob Halford. The problem is Rob Halford was not the lead singer of Judas Priest in 1999. Tim 'Ripper' Owens was.
Continuity mistake: When the officer is taking Gloria to D-Block because she had a "friend in high places," and she asked where he was taking her, when she's walking down the hall towards D-Block, she's only carrying a small bundle of belongings, but then once it cuts to her entering D-Block, she's now carrying all of her stuff in a much larger bundle. (00:44:00)Jay Simons
Continuity mistake: Larry and Cal are cooking hot dogs over an open fire. Larry starts out with a straight stick, Cal with a curved stick. Larry puts his hotdog on the curved stick, then has the straight stick as he puts it over the fire. The swap happens again and Larry ends the scene with the curved stick. Also, the tip of the straight stick swaps from a sharp point to a dull point. (00:40:30 - 00:41:50)
Continuity mistake: When Angie tries to smuggle cake out of the cafeteria, she puts away her tray and then tries to slip after the guard. When he stops her, she turns to make her way back to the now empty table; in the next shot, the tray is on the table once again. (00:16:25)balistener
Visible crew/equipment: When Flores discovers her cell phone is missing from the hole in the wall she goes nuts, slams the stall door and kicks it in. After she is taken away there's a closeup of the stall and we can see the metal spring that was duct-taped to the bottom of the wall inside.Super Grover
Continuity mistake: The water bottle is down to the lower writing on the bottle when the scene starts. As the scene switches cameras back and forth multiple times, the level of the water keeps changing. The bottle also keeps turning. (00:21:25 - 00:24:10)kacohn