Five-year-old Lucie Arnaz and 4-year-old Desi make...

Five-year-old Lucie Arnaz and 4-year-old Desi make their one and only appearance in a crowd scene on I Love Lucy (today at 5:30 p.m. on KTTV).

Don Knotts hosts the repeat of The Andy Griffith Show Silver Anniversary Special (today at 4 p.m. on TBS), featuring clips from best-loved episodes of the series.

The Mills Brothers join Nat King Cole on a vintage The Nat King Cole Show (today at midnight on KOCE).

Daddy-to-be Warren Beatty appears as snobbish Milton Armitage on Dobie Gillis (early Monday at 4:30 a.m. on Nickelodeon).

Leon Ames of “Mr. Ed” plays Mayberry’s high school principal who refuses to allow the students to put on a controversial play on The Andy Griffith Show (Monday at 4:35 p.m. on TBS).

Vincent Price plays a criminologist who believes he is incapable of making a mistake on an Alfred Hitchcock-directed episode of Alfred Hitchcock Presents (Monday at 10 p.m. on Nickelodeon).

Audrey Meadows of “The Honeymooners” plays a woman who is two-timing her husband on Alfred Hitchcock Presents (Wednesday at 10 p.m. on Nickelodeon).

Dick Gautier, better known as “Hymie” of “Get Smart,” plays an out-of-work musician who arrives at the Lane household for dinner and stays for days on The Patty Duke Show (early Wednesday at 1 a.m. on Nickelodeon).

Brig. Gen. James Stewart visits My Three Sons (Thursday at 1:30 a.m. on Nickelodeon) in an episode in which Robbie is ostracized as an egghead for being an “A” science student.

TBS goes to the dogs Friday, presenting man’s best friend-themed episodes of the series Laverne & Shirley (2:05 p.m.), Happy Days (2:35 p.m.), Bewitched (3:05 p.m.), The Andy Griffith Show (3:35 p.m.) and The Jeffersons (4:05 p.m.)

A pre-”Cheers” Kirstie Alley is featured in two repeat TV movies: 1986’s Prince of Bel Air (Friday at 9 p.m. on Lifetime), in which she plays an artist who falls for a charming pool man (Mark Harmon) and 1985’s A Bunny’s Tale (Saturday at 6 p.m. on Lifetime), a dramatization of how feminist Gloria Steinem went under cover at the New York Playboy Club.