The lovable Mork (Robin Williams) from Ork...

The lovable Mork (Robin Williams) from Ork drops by to visit on “Happy Days” (Sunday at 7:05 a.m. on TBS).

Richard Greene robs from the rich to give to the poor in “Robin Hood: The Quest Crown” (Sunday at 10 a.m. on KTLA), a two-hour version of the old “The Adventures of Robin Hood” series from the ‘50s. Donald Pleasance co-stars as the evil King John.

Nickleodeon is adding two classic cartoon series to its weekday lineup: “Underdog” (Monday-Fridays at 4 p.m.) and “The Bullwinkle Show” (Mondays-Fridays at 7:30 p.m.).

David Birney, Barbara Perkins, William Shatner, Steve Forrest and Barry Brown star in “Testimony of Two Men” (Monday-Tuesday at 5 p.m. on TNT), a six-hour 1977 miniseries based on Taylor Caldwell’s novel about a committed doctor who leads a crusade to bring modern medicine to a local community.

Richard Burton, Maurice Evans, Lee Remick and Roddy McDowall star in a 1960 “Hallmark Hall of Fame” presentation of Shakespeare’s “The Tempest” (Tuesday at 6 and 10 p.m. on A&E;).

Lola Albright guests on “The Dick Van Dyke Show” (Tuesday at 9:30 p.m. on Nickelodeon) as a domineering movie star who makes Rob take over as producer of “The Alan Brady Show.”

Dick (Darren No. 1) York guests on “Alfred Hitchcock Presents” (Tuesday at 10:30 p.m. on Nickelodeon) in an episode in which a man is shortchanged by a bank clerk and decides to get even.

Raquel Welch guests on a two-part “Mork & Mindy” (Tuesday-Wednesday at midnight on Nickleodeon) as a beautiful but deadly agent sent to Earth by Ork’s archenemies to seduce Mork.

Relive the first episode of “Mr. Ed” (Thursday at 5 a.m. on Nickelodeon) which originally aired Oct. 1, 1961 on CBS.

Tom Smothers, sans brother Dick, checks into the St. Francis on “Hotel” (Friday at 10:30 a.m. on Lifetime).

Betty Hutton guests on “The Nat King Cole Show” (Saturday at 9 p.m. on KOCE).

Warren Beatty guests as snobby Milton Armitage on “Dobie Gillis” (next Sunday at 5:30 a.m. on Nickelodeon) in a episode in which Dobie asks for help from a famous athlete when Thalia discovers there’s money in physical prowess.