Don’t know what to watch tonight? Here are my top recommendations for Thursday.

The Big Bang Theory (CBS, 8pm EST) – Professor Proton is back! Bob Newhart reprises his Emmy award winning role as Professor Proton, childhood hero of Leonard and Sheldon. But wait. There’s more. After Leonard gets Professor Proton’s help with an experiment, Sheldon befriends Bill Nye, arch-nemesis of Professor Proton. All this episode is missing is Beakman from Beakman’s World. Seriously, don’t miss this one.

The Crazy Ones (CBS, 9pm EST) – Josh Groban guest stars as a former co-worker of Sydney’s (Sarah Michelle Gellar), who has written a song about her. This show is a gem. If you haven’t seen it yet, you should check it out. PS – I’m writing this while Mrs. Doubtfire is on.

What are you watching tonight?