Get Smart (Sunday at 9 p.m. on...

Get Smart (Sunday at 9 p.m. on Nickelodeon) spoofs the series “I Spy” and star Robert Culp pops up in a cameo role.

A leather-jacketed Peter Boyle and John Belushi play dueling Marlon Brandos on The Best of Saturday Night (Sunday at 11 p.m. on Nickelodeon).

A pre-”M*A*S*H” Jamie Farr guests on Get Smart (Monday at 9 p.m. on Nickelodeon) in an episode in which Chief assigns Smart and 99 to get a deadly scientific theory from KAOS.

Teen heartthrob of the ‘50s and ‘60s, Frankie Avalon, appears at the Lanes’ doorstep and asks to use the phone on The Patty Duke Show (Tuesday at 1 a.m. on Nickelodeon). Another heartthrob of that era, Troy Donahue, visits the show Wednesday as a doctor with whom Patty falls in love.

Oscar-winning actress Jessica Tandy plays a former artists’ model who helps nab a clever art swindler on O’Hara, U.S. Treasury (Tuesday at 11 a.m. on A&E;).

Brian Keith plays a successful attorney who is persuaded to take on a case of a boy accused of knifing another boy on Alfred Hitchcock Presents (Tuesday at 10 p.m. on Nickelodeon).

Anthony Perkins gives a viewers’ test for the Norman Bates’ School of Motel Management on The Best of Saturday Night (Wednesday at 11 p.m. on Nickelodeon).

Not only does Fred MacMurray play Steve Douglas on a four-part My Three Sons (Wednesday-Saturday at 1:30 a.m. on Nickelodeon), he also doubles as his look-alike Scottish cousin, Fergus.

Before he became “Bewitched,” Dick York guested on Alfred Hitchcock Presents (Friday at 10 p.m. on Nickelodeon) as a seemingly meek guy who plans a heist of more than $500,000.

Robert Loggia of the film “The Jagged Edge” plays a blackmailer on Alfred Hitchcock Presents (Saturday at 10 p.m. on Nickelodeon).

When George Burns offers $25,000 for a new act to open for him in Las Vegas, Wilbur decides he can make a bundle with his talking horse on Mr. Ed (Sunday, April 28, at 2:30 a.m. on Nickelodeon).

Crooner Tony Martin comes to town and gets a ticket for speeding on The Donna Reed Show (Sunday, April 28, at 2 a.m. on Nickelodeon).