The Big Bang Theory (CBS, 8 p.m.) — Stephen Hawking rolls by, much to Kaley Cuoco’s dismay.
Person of Interest (CBS, 9 p.m.) — “Reese must surreptitiously protect an investigative reporter without becoming a part of her story.” I have nothing to add to that, so I’d like to instead mention that Louis C.K. and RZA (and David Chang) are on Fallon tonight. Brb, me and Danger are gonna explode.
It’s Always Sunny In Philadelphia/The League (FX, 10 p.m.) — Charlie and Dee look for love in a hopeless place, i.e. amongst the rich, while Kristin Cavallari, who is married to a cat, guest stars on The League, hopefully reprising the same award-winning role she played in Cheerleader Camp. Hey, they don’t hand out Best Reality Star Who Was In a TV Movie Directed By the Guy Who Wrote It’s a Mall World trophies to just anyone.
Childrens Hospital/NTSF: SD: SUV:: (Cartoon Network, 12 a.m.) — No Parks and Rec tonight, but if you need a Aubrey Plaza fix, she’ll be on the season finale of NTSF as the Rememberer. I wonder if she’ll be sarcastic and droll? Also in the episode: Ray Liotta, whose post-Cop Land career makes me sad. That was 15 years ago.
LATE NIGHT GUESTS: Aerosmith on Letterman; Jamie Lee Curtis, Barry Zito, and Sergio Romo on Leno; Jon Stewart, Stephen Colbert, and the Avett Brothers on Kimmel; Joel McHale and Alton Brown on Ferguson; Louis C.K., RZA, and David Chang on Fallon; John C. Reilly and Casey Wilson on Conan; Bob Woodruff on Stewart; and Al Simpson on Stewart.