Retro : Also worth watching:

Nick at Nite’s Wedding Nite (tonight from 8-10 p.m. on Nickelodeon) presents marriage-themed episodes of “Mork & Mindy,” “Mr. Ed,” “Get Smart” and “Dobie Gillis.”

Alfred Hitchcock appears in front of and behind the camera of the “Poison” episode of Alfred Hitchcock Presents (tonight at 10 p.m. on Nickelodeon), a thriller about an American plantation owner in Malaya who discovers that a poisonous snake is asleep on his chest.

Thanks to Felix, Oscar gets to join Howard Cosell as third man on the network team of ABC’s “Monday Night Football” on The Odd Couple (Monday at 6 p.m. on Channel 56).

Peter Lawford guests on Alfred Hitchcock Presents (Monday at 10 p.m. on Nickelodeon) as a man who has lost a lot of money in racetrack bets and decides to commit murder in order to get a man’s money.

Elinor Donahue of “Father Knows Best” and “Get A Life!” guests on Mork & Mindy (Tuesday at 8 p.m. on Nickelodeon) in an episode in which Mork buys a Maid-O-Matic to help with the housework.

Carole Shelley and Monica Evans, who played the wacky Pigeon sisters on Broadway in “The Odd Couple,” reprise their roles on the small-screen The Odd Couple (Thursday at 6 p.m. on Channel 56).

Before she became the vamp Alexis on “Dynasty,” Joan Collins guested on Ellery Queen (Friday at 11 a.m. on A&E;) in an episode in which Ellery must solve the murder of an eccentric millionaire.

Elizabeth Taylor and Roddy McDowall, who starred together in 1942’s classic “Lassie Come Home,” guest on Hotel (Saturday at 3 p.m. on Lifetime).

Daddy Dearest Sitcom Zone (Saturday from midnight to early Sunday at 4 a.m. on Nickelodeon) features eight classic confrontations between “Dobie Gillis” (Dwayne Hickman) and his loudmouthed father, Herbert T. Gillis (Frank Faylen).