Continuity mistake: On the tombstone in the previous episode, Michael's date of death is 11.4.2005. But in this episode, when Linc goes to the graveyard to visit Michael's grave, his date of death is 11.4.2010. It is also a different grave from the original, as the original was in South America beside the beach, and here we are led to believe it is in New York. (00:50:50)
Continuity mistake: When Quinn falls in the well, he falls through and subsequently destroys the well cover. At the end of the episode when the Secret Service boys show up, an undamaged cover is lying next to the well, which Kellerman uses to cover it up. (00:29:30 - 00:38:30)
Factual error: When Michael fills the tank with water (below the stock room), he then strips his clothes off, and slides down a pipe and into the water at the bottom of the tank. Since the water level was way above him, the pipe he slid down and the access to get there would have been flooded also. There was no water in the pipe he slid down, so for that area to be dry, it would have to be above the water line.
Plot hole: Michael sees that Tancredi needs help in the sickroom/nurse room from a TV monitor. So he climbs up to the roof and looks down to see Tancredi screaming for help. So he goes down, under the field. And then he is in the space between the inner roof and inner ceiling, and he walks to save Tancredi. Why didn't they use this escape way when the first failed? And they didn't need that key from Tancredi. They could escape just by walking in the ceiling space.
Other mistake: When Michael climbs up the rope to get to the room below the infirmary, the rope is hanging from the manhole cover, but he still manages to lift the cover whilst hanging from it. In the next shot where he looks down the manhole, its clear that there is nothing other than the rope he could have held on to while lifting the cover. An impressive accomplishment, defying the laws of gravity. (00:38:00)
Plot hole: Gretchen, Lincoln, and Sophia were able to visit Scofield and Whistler in Sona without Gretchen being recognized. She was taken in for questioning in episode 9, but she managed to escape and kill General Zavala and one other guard. The other guards knew that she was the one who killed Zavala but she was still able to sign in for visitation.
Plot hole: The Kansas police arrest Bellick for, and he is subsequently convicted of, Geary's murder based in part on a threatening voice mail he left on Geary's phone. But The Message's time and date would match the records of Bellick's admittance into the hospital, thus proving him innocent of the crime.
Revealing mistake: Near the end, when Michael is unscrewing the sink before kicking the wall in, watch his hands in the foreground while he is talking to Sucre. Just when Sucre says "But what you were doing up there in the infirmary." Michael starts using his fingers to take the bolt out. You can see that there is no bolt, just him turning air, with a mystery 'unscrewing' sound effect. (00:39:35)
Continuity mistake: When Steadman is watching the agent put the bags that contain the remains of Veronica Donovan into the trunk of the silver car, the license plate changes between shots. The first time we see the car, the plate reads "1029Q", the second time (close-up shot as the agent closes the trunk) it reads "9417X". (00:37:20)
Revealing mistake: In the scene where Sarah crashes into the agent's buggy, you see they have been replaced with dummies. When the car first hits, you see one of the dummies fall out, but they are both seated in the next shot. Also you see that it is not Sarah driving but a man. (00:36:50)