Tyler Posey

The Exes' Holly (Kristen Johnston) might need a little hair of the dog — er, wolf — after spending the night with NYU Law student Eric (Teen Wolf star Tyler Posey) on the August 21 episode. "It was a tricky role to cast," creator Mark Reisman says. "We wanted someone youthful but who didn't seem like a child. Tyler was perfect."

Holly finds herself confused by the whippersnapper's advances when the two meet at the bar: Does he want her to tutor him, or go to bed with him? "She's trying to wrap her head around the idea that a young guy could be interested in her," Reisman says. "We very much wanted him to be the instigator in this situation."

Posey's guest spot is slated to last only one episode, but Reisman isn't totally rulingout a return: "We're always trying to bring back people who work well."

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