Happy Endings 9 p.m., Channel 5
This show has gotten a bit gonzo in its third season. Some of the subplots turn a little bit surreal as they develop, and the writers are letting the actors go nuts. Eliza Coupe, in particular, is having a good time. She likes to mug, and they like to let her mug. Tonight, Max becomes a hit on the bar mitzvah circuit as an MC — which I’m picturing as Laurence Olivier in “The Entertainer.” Pictured: Damon Wayans Jr., Coupe, Elisha Cuthbert, Zachary Knighton, Casey Wilson.