When Kip asks fellow workers in the cafeteria to watch his demon tape, he invites a guy named Chuck. Zachary Levi goes on to star in a show named Chuck.
At the end of the episode, Kip is singing in the break area and Owen compliments his singing and asks if he's ever thought of doing it professionally. Zachary Levi has starred in 2 different Broadway musicals and has recorded a few songs, including some from the movie Tangled.