Loni Anderson appears in an episode of...

Loni Anderson appears in an episode of The Bob Newhart Show (Sunday at 10:30 p.m. on Nickelodeon) in which Bob deals with an improbable paternity suit.

Gabe Kaplan (“Welcome Back, Kotter”) plays a cop with a humorous approach to fighting crime on Police Story (Monday at 9 a.m. on A&E;).

Leslie Nielsen gets dramatic in a vintage Columbo (Monday at 11 a.m. and Tuesday at 6 a.m. on A&E;) mystery.

Marjoe Gortner and Don Meredith are guests on Police Story (Monday at 2 p.m. and Tuesday at 9 a.m. on A&E;) in a tale about an addict who makes a deal with the cops to catch some bank robbers.

Before he became Luke Spencer on “General Hospital,” Anthony Geary played a handsome minister dating Laurie on The Partridge Family (Monday at 8 p.m. on Nickelodeon).

Mary raises eyebrows when she begins dating Murray’s dad (Lew Ayres) on The Mary Tyler Moore Show (Monday at 10:30 p.m. on Nickelodeon).

David Janssen stars as a veteran cop who is too emotionally involved in his job on a two-part Police Story (Tuesday and Wednesday at 2 p.m. on A&E;).

Orson Welles introduces “The Dream Sequence Always Rings Twice,” a clever, 1985 episode of Moonlighting (Wednesday at 2 p.m. on Lifetime) that was shot in black and white.

Lucy and Vivian’s car breaks down near Joan Crawford’s house on The Lucy Show (Wednesday at 11:30 p.m on Nickelodeon).

Martin Balsam, Kim Hunter and Jack Carter are guests on Police Story (Thursday at 2 p.m. and Friday at 9 a.m. on A&E;) in an episode in which a maverick detective accidentally kills a fellow officer.

Denver Pyle appears as Rob’s marriage-minded Uncle George on The Dick Van Dyke Show (Thursday at 11 p.m. on Nickelodeon).

Dana Delany plays David’s old girlfriend, who returns to rekindle their relationship, on Moonlighting (Friday at 2 p.m. on Lifetime).