How I Met Your Mother, Fringe, and Chef Academy

8 p.m., CBS

How I Met Your Mother

HIMYM has reached the 100th episode landmark—and to celebrate, the show welcomes guest stars Tim Gunn, Stacy Keibler, and Rachel Bilson (who could be The Mother!). Plus, there's a suit-filled musical number. It's going to be... well, you know.

9 p.m., FOX

Fringe

Fringe on Monday? Yep—two new episodes are airing this week (one tonight, one on Thursday), and tonight's installment is actually an un-aired episode from Season 1: A girl is taken off life support, then mysteriously awakens with top-secret military knowledge and the ability to speak Russian. Oh, yeah. Real Fringe-y.

10 p.m., ABC

Castle

While investigating the death of a bridesmaid, Castle (Nathan Fillion) discovers that the bride (guest star Alyssa Milano) is his ex-girlfriend... and Beckett (Stana Katic) gets a little jealous.

Season 1 finale, 10 p.m., BRAVO

Chef Academy

In back-to-back episodes at 10 and 11 p.m., the pupils endure their final tests of the season.

11 p.m., COMEDY

The Daily Show

Jon Stewart interviews controversial Berkeley law professor John Yoo, who assisted the Bush Administration in legally justifying torture. Is it time for another Cramer-style beatdown?

Also on the airwaves...
The Bachelor, 8 p.m., ABC
House, 8 p.m., FOX
Chuck, 8 p.m., NBC
The Secret Life of the American Teenager, 8 p.m., ABC Family
Accidentally on Purpose, 8:30 p.m., CBS
Two and a Half Men, 9 p.m., CBS
Heroes, 9 p.m., NBC
Intervention, 9 p.m., A&E;
Make It or Break It, 9 p.m., ABC Family
Cake Boss, 9 p.m., TLC
The Big Bang Theory, 9:30 p.m., CBS
CSI: Miami, 10 p.m., CBS
Hoarders, 10 p.m., A&E;
Men of a Certain Age, 10 p.m., TNT
NCAA Men's Basketball: Oklahoma State v. Oklahoma, Arkansas-Pine Bluff v. Alabama State, Morgan State v. Hampton, Villanova v. Louisville
NCAA Women's Basketball: Maryland v. Virginia

What are you watching tonight?

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Follow TV.com writer Stefanie Lee on Twitter: @StefAtTVDotCom