Peggy Cass is featured on Alfred Hitchcock...

Peggy Cass is featured on Alfred Hitchcock Presents (Sunday at 10 p.m. on Nickelodeon) in a thriller about a wealthy deceased man who comes back to life while at the mortuary.

Valerie Harper makes her last appearance as a regular on The Mary Tyler Moore Show (Sunday at 11 p.m. on Nickelodeon) in an episode in which Lou and Rhoda become romantically involved.

Jack Cassidy and Isabel Sanford are guests on Bewitched (Monday at 5:35 a.m. on TBS) in an episode in which Samantha is sent back to New Orleans, circa 1868, when a witch thinks she is the other woman in her husband’s life.

Look for Penny Marshall on The Mary Tyler Moore Show (Wednesday at 9 p.m. on Nickelodeon) in an episode in which Mary spends every night at a singles bar for a news story.

On Christmas Eve, TBS presents holiday-themed episodes of its daytime lineup: Bewitched, Little House on the Prairie, The Flintstones, The Jetsons, Saved by the Bell, Three’s Company, The Andy Griffith Show, The Beverly Hillbillies and Sanford and Son (Thursday, beginning at 5:35 a.m.).

Beginning at 8 p.m. Christmas, Nick at Nite decks the halls with 10 1/2 hours of Yuletide-themed episodes of TV Land series, including Mork & Mindy, The Mary Tyler Moore Show, The Lucy Show, Mr. Ed, Dragnet, Dobie Gillis, The Dick Van Dyke Show, The Donna Reed Show and The Patty Duke Show (Friday on Nickelodeon).

Goober (George Lindsay) from “The Andy Griffith Show” visits his cousin on Gomer Pyle, U.S.M.C. (Saturday at 3 a.m. on TBS.).

Michael Tolan plays Mary’s handsome new boyfriend who just happens to be her journalism professor on The Mary Tyler Moore Show (Saturday at 11 p.m. on Nickelodeon).