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, it's 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)
And Then There Were 7 - S1-E11
Other mistake: In the first couple of minutes, Michael is sitting on the bed. When he leans forward, you can see his back, but no tattoos. (00:01:00)
Other mistake: When T-bag catches Michael in his cell looking for the Allen key, he says, 'What are you doing in my cell?' but he doesn't have his usual southern accent. (00:20:00)
Riots, Drills and the Devil: Part 2 - S1-E7
Other mistake: Unlike everyone else in the prison during the riot, Sara Tancredi is not drenched in sweat. In fact, she's not sweating at all.