Nickelodeon celebrates Mother’s Day with three hours...

Nickelodeon celebrates Mother’s Day with three hours of maternally themed episodes of “The Lucy Show” (Sunday, 8-11 p.m.).

The first episode of “I Love Lucy” (Monday at 3:05 a.m. on TBS), which aired Oct. 15, 1951, finds Ethel wanting to celebrate her 18th wedding anniversary at the Copacabana. Fred, of course, wants to go to the fights.

Veteran actor Leon Ames (Judy Garland’s pop in “Meet Me in St. Louis”) plays the Mayberry High School principal on “The Andy Griffith Show” (Monday at 5:05 p.m. on TBS).

A pre-Spock Leonard Nimoy beams down to “Get Smart” (Monday at 9 p.m. on Nickelodeon) in an episode in which Smart believes a pool parlor is actually a KAOS front.

That’s a young Richard Dawson playing a romantic British film star with designs on Laura on “The Dick Van Dyke Show” (Tuesday at 9:30 p.m. on Nickelodeon).

Elizabeth Montgomery plays mischievous cousin Serena on a two-part “Bewitched” (Wednesday-Thursday at 5:35 a.m on TBS).

It’s “Lassie: The Miniseries.” In a three-part episode (Wednesday-Friday at 6 and 9 a.m. on Nickelodeon), everyone’s favorite, fearless collie is accidentally locked in a van, driven 650 miles from home and attacked by a wolf!

Dennis (Jay North) goes the Kevin Costner route when he pretends to be Robin Hood on “Dennis the Menace” (Wednesday at 6:30 a.m. Nickelodeon).

Nickelodeon repeats the very first episode of “The Adventures of Superman” (Wednesday at 8:30 p.m.), which finds an itty-bitty Supie being rocketed from his dying planet Krypton to Earth where he is raised by a kindly couple, the Kents.

Meet the Bunkers on the debut of “All in the Family” (Thursday at 11:35 a.m. on TBS).

ABC repeats the second “Columbo” movie, “Ransom for a Dead Man” (Thursday at 8 p.m. on ABC), which originally aired on NBC 21 years ago. Lee Grant is the special guest.

Before Robert Vaughn said “U.N.C.L.E.,” he guest-starred on “The Dick Van Dyke Show” (Thursday at 9:30 p.m. on Nickelodeon).

George Gobel guests on “F Troop” (Friday at 8 p.m. on Nickelodeon) in an episode in which Capt. Parmenter disguises himself as a Mississippi gambler to win back F Troop’s lost pension fund in a poker game.