House (8:00 p.m. EST, FOX)

A man falls mysteriously ill in tonight’s episode. What’s weird about that? Well, he’s a “knight” who lives in a reclusive community that’s modeled on the Renaissance. The team does its best to figure out why the knight has become ill, and the knight and Thirteen (Olivia Wilde) debate courtly love and knightly honor. Meanwhile, Wilson (Robert Sean Leonard) renews a relationship with an ex (Cynthia Waltros).

Rules of Engagement (8:30 p.m. EST, CBS)

On tonight’s episode, Jeff (Patrick Warburton) tries to find some alone time when Audrey’s (Megyn Price) night out with the girls is cancelled. Good luck doing that, Jeff. Meanwhile, Russell (David Spade) learns that Timmy (Adhir Kalyan) has a lot of pent-up anger towards him.

You’ll have to tune in to find out why.

Romantically Challenged (9:32 p.m. EST, ABC)

No, that’s not a typo: this show actually airs at 9:30 p.m. EST this evening. During the show’s premiere, lawyer and mother Rebecca (the gorgeous Alyssa Milano) makes her debut into the dating scene after 15 years of marriage. She looks to her friends for support and advice…but they’re pretty clueless, so she’s pretty much on her own. Lisa (Kelly Stables), Rachel’s younger sister, suggests that Rachel try out a one-night stand. Who’s the lucky guy?