Let's Get Hairy

S4 E8: Stewart Gimbley (Joshua Malina) bursts into the Psych office looking for help from Shawn and Gus after the police refuse him. Stewart hands them a gun with silver bullets and wants the guys to lock him up and observe him overnight because Stewart believes he’s a werewolf. He offers them three times their rate and they readily accept, thinking it will be easy money. After Shawn and Gus tie Stewart up and fall asleep for the night, they are suddenly wakened by the sound of the window shattering. Stewart is gone and a tuft of grey animal hair dangles from a shard of glass. Later that night two hunters are found brutally attacked in the woods and Shawn and Gus think they know the cause.