Tim Conway and Vicki Lawrence: They play Greg's visiting parents on Yes, Dear.  "Who's Greg?"  I'm not sure.  (TBS, 1:30 PM)

Connie Britton: She's on Ellen (the sitcom, not the talk show).  (Oxygen, 1:30 PM)

Michael Keaton: Batman visits King Of The Hill.  (FX, 2 PM)

Edie McClurg and Tobin Bell: Mrs. Poole and Jigsaw in the same Seinfeld episode...I think the fabric of time and space just ripped a little bit.  (TBS, 5:30 PM)

My Favorite Martian: Ray Walston, a.k.a. Mr. Hand, guests on Star Trek: Voyager. (Spike, 5 PM)

Aw, Joe Morton: I love that guy!  He's got several Law & Orders to his credit, and there's on one on TNT at 7 PM.

Dave Foley: He's on Scrubs (Comedy Central, 7 PM).

Phyllis Diller: It's kind of not the same if you can't see her wigs, but she's a guest voice on Family Guy (CW, 7:30 PM)

Felicity Huffman: Joins Mare Winningham in what sounds like a really awful Lifetime movie, Snap Decision, about a mother accused of promoting child pornography or some damn thing.  (Lifetime Movie Network, 8 PM)

Ernest Borgnine: The good news is that Borgy is still alive (I thought he died -- sorry dude!).  The bad news is that he's in a treacle-o-rama called A Grandpa For Christmas.  (Hallmark [where else?], 9 PM)

Heath Ledger: As Casanova.  Well, dude's got bills to pay.  (Encore Love, 9 PM)

Ribisi 'n' Renfro: Co-starring with James Marsden in the Philly gangster drama 10th and Wolf. (SHOXe, 11:35 PM)

David Caruso and Nicolas Cage: If something inside you hasn't already died, watch the scenery-chewing showdown in Kiss Of Death. (OutMax, midnight)