Mindy’s pretty but shallow high school rival...

Mindy’s pretty but shallow high school rival (Morgan Fairchild) makes a date with Mork on Mork & Mindy (Monday at 8 p.m. on Nickelodeon).

Conrad Janis, better known to Nick at Nite fans as Mindy’s dad, guests on Get Smart (Monday at 9:30 p.m. on Nickelodeon) in an installment in which Smart tries to keep his occupation a secret from visiting relatives.

Mary Tyler Moore directed “A Boy’s Best Friend Episode” of The Mary Tyler Moore Show (Thursday at 4 p.m. on KDOC) which focuses on Ted’s concern over the relationship between his mother and her companion with whom she is living.

Jack Larson, a.k.a. Jimmy Olson, guests on The Dick Van Dyke Show (Friday at 9 p.m. on Nickelodeon) in an episode in which an underworld figure gets Sally, Rob and Buddy involved in a bizarre writing assignment.

Myron Floren Presents Stars of the Lawrence Welk Show (Friday at 9:30 p.m. on KOCE) features such regular cast favorites from the old “Lawrence Welk Show” as JoAnne Castle, Bobby Burgess and Barbara Boyland, Joe Feeney, Arthur Duncan, Jack Imel, Henry Cuesta, Barney Liddell and Ralna English performing polkas, country medleys, patriotic and show tunes and gospel hymns.

Comedian George Gobel guests on F Troop (Saturday at 9 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.

Nick’s Naughty and Nice Night (Saturday from 10 p.m. to 2 a.m.) features a naughty and nice mix of characters from the Nick at Nite series.