In a bizarre television crossover, Dennis the...

In a bizarre television crossover, Dennis the Menace and Mr. Wilson are neighbors of the Stones on “The Donna Reed Show” (Friday at 9:30 p.m. on Nickelodeon). In it, Dennis lends a hand in Donna’s redecorating project.

Joan Collins--yes, that’s right--portrays a Depression-era pacifist in the “Star Trek” episode “The City on the Edge of Forever” (Thursday at midnight on KCOP). It was written by science-fiction author Harlan Ellison.

Larry, Moe and Curly have a hard time being “Women Haters,” a classic “Three Stooges” (Saturday at noon on KTLA).

Dick Van Dyke’s real-life children Barry and Christian are looking for work on “The Dick Van Dyke Show” (Wednesday at 8:30 p.m. on KDOC). Barry is the young violinist; Christian is Frankie, the kid with a cigarette dangling from his lips.

Stymie Beard, one of the Little Rascals all grown up, guest stars as Monte on “Good Times” (Tuesday at 2:35 p.m. on TBS).

Jay Silverheels (the Lone Ranger’s Tonto) is Chief Dan Eagle Cloud on the third part of the Grand Canyon adventure of “The Brady Bunch” (Wednesday at 1:35 p.m. on TBS).

Poor Richard Kimble. In a particularly nerve-racking episode of “The Fugitive” (Monday at 7 a.m. on A&E;), he is injured while helping capture and escaped convict and is taken to--of all places--a prison hospital.

In one of the classic scenes in “I Love Lucy” (Monday at 11 p.m. on KTTV), Lucy puts too much yeast in the bread she’s baking, and. . .well, you can guess the rest.

Harris gets carried away with an investigation and turns a decoy porno film he’s making into a major production in part one of a two-part “Barney Miller” (Tuesday at 11:30 p.m. on KCAL). It concludes the following night.