Mike and Lisa hire a hot young babysitter for Tommy, but the skimpily clad teen brings more teen angst to the household than the Rileys can handle. Meanwhile, when a disabled food-delivery guy accidentally intrudes upon Callie's naked dance party, Adam finally confronts her about her habits in the apartment. But when they find out the delivery guy is also a computer whiz and decide to hire him, Adam learns a lesson in indecent exposure the hard way. Also, Mike and Adam try to convince Ethan to get rid of his hideous necklace, but he finds comfort in a new fling who does not see the necklace the same way.