When Leo goes to solitary to talk with Alvarez, Alvarez's right nipple and a little of his shoulder is exposed. By the end of the scene no skin is showing.
Following the fight Cyril's hair is tied tightly in a ponytail. As he's standing talking to Ryan, his hair changes from it being pulled back tight to loose around his face.
When the rat jumps on Kareem Said in solitary at the start of the episode a hand can be seen throwing the rat onto his shoulder.