Continuity mistake: When Sara comes to visit Gretchen is a little mistake. When Sara makes a little cut in Gretchen's throat, the wound looks different sometimes, and at one point completely vanishes.
Prison Break (2005)
1 continuity mistake in The Price
Starring: Dominic Purcell, Robert Knepper, Wentworth Miller, Amaury Nolasco
And Then There Were 7 - S1-E11
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)
Riots, Drills and the Devil: Part 1 - S1-E6
T-Bag: Can't you transfer us some place cooler? Like Africa? (00:16:20)
Trivia: Paul Adelstein, who plays Paul Kellerman, also guest starred in a season 4 episode of Law and Order SVU in which he played a character named Kellerman.
More questions & answers from Prison Break
Answer: Because of coincidence.