(ALL TIMES ET)

8PM | CBS
The Big Bang Theory – Sheldon’s mama visits, which puts him into hyper-competitive mode, because she seems to be paying more attention to his friends.

9PM | LIFETIME – 9TH SEASON FINALE, PART 1
Project Runway – The Big Gunn – PR mentor Tim Gunn – visits the finalists at home to see how their collections are progressing.

10PM | FX
It’s Always Sunny in Philadelphia – The storm of the century is scheduled to hit Philly, which means panicked shopping for Mac, and looting for other Philadelphians. And, of course, there is a bunker involved.

10PM | MTV – 4TH SEASON FINALE
Jersey Shore – Here’s The Situation: As the NJ crew prepares to leave Italy and head back home, their frustration with Mike’s buttinsky ways leaves him threatening not to join them back at the Shore.

10PM | CBS
The Mentalist – Rigsby worries that his new girlfriend is going to cause hard feelings between him and Van Pelt, while Jane (Simon Baker) and the team investigate the murder of a woman whose body washed up on the coast of California.

10:30PM | FX
The League – Ruxin worries that Taco is going to sleep with the attractive nanny (guest Brie Larson) he hired to take care of Geoffrey.

11PM | MTV
Jersey Shore Season 4 Reunion – Because these people have some explainin’ to do.

Worth flipping to during commercials:
– Elena and her friends begin their senior year on The Vampire Diaries (8PM, The CW);
– Lee Majors and Marilu Henner guest star on Grey’s Anatomy (9PM, ABC);
– Reese and Finch have to deal with a tough judge and a Person of Interest (9PM, CBS) who doesn’t like the way they do what they do;
– Addison treats a pregnant woman who lost her memory after a car accident on Private Practice (10PM, ABC).

And the late-night line-up:
– Conan (11PM, TBS): Jesse Tyler Ferguson;
– The Daily Show with Jon Stewart (11PM, Comedy Central): Richard Brookhiser;
– The Colbert Report (11:30PM, Comedy Central): Coldplay;
– The Late Show with David Letterman (11:35PM, CBS): George Clooney (REPEAT);
– The Tonight Show with Jay Leno (11:35PM, NBC): Hugh Jackman and Tony Bennett (REPEAT);
– Jimmy Kimmel Live (12:05AM, ABC): Mute Math (REPEAT);
– Late Night with Jimmy Fallon (12:35AM, NBC): Will Forte and Amy Sedaris (REPEAT);
– The Late Late Show with Craig Ferguson (12:37AM, CBS): Tom Lennon;
– Last Call with Carson Daly (1:35AM, NBC): Michelle Monaghan (REPEAT).