Raquel Welch is a stewardess on “Bewitched”...

Raquel Welch is a stewardess on “Bewitched” (8 p.m. Friday, Nickelodeon) not long before the movie “One Million Years B.C.” made her a star.

Bob Hartley says goodby to Chicago in the final “Bob Newhart Show” (9 p.m. Wednesday, KDOC). He gives up his psychology practice to take a teaching job in Oregon. But don’t be alarmed, KDOC begins another run of the series the next day.

The Enterprise faces Khan’s wrath for the first time in “Space Seed,” a “Star Trek” episode (midnight Friday, KCOP) that introduced Ricardo Montalban as a superhuman warrior. Khan would resurface in the movie “Star Trek II” a little older and with an updated wardrobe.

“Gomer Overcomes the Obstacle Course” in the first episode of “Gomer Pyle, U.S.M.C.” (1:30 a.m. Thursday, TBS). He will continue to try to please his sergeant for 149 more episodes.

In “Birth of a Keaton--Part One” Andrew prepares to make his big entrance--while Elyse is singing on a telethon--on “Family Ties” (6:30 p.m. Monday, KTTV).

Harris disappears while working undercover as a skid row bum in part 1 of “Vanished” on “Barney Miller” (11:30 p.m. Monday on KCAL). He’ll reappear in part 2 Tuesday.

An Emmy for writing went to the “Coast-to-Coast Big Mouth” episode of “The Dick Van Dyke Show” 8:30 p.m. Monday, KDOC). The big mouth is Laura Petrie, who tells a national TV audience that Alan Brady wears a toupee.

Danny argues a traffic case before silent-film star Francis X. Bushman, who plays a jurist in “Make Room for Daddy” (4 a.m. Monday), Nickelodeon).

Paul Simon and George Harrison team up to sing “Here Comes the Sun” on “The Best of Saturday Night Live” (10 p.m. Thursday, KDOC).

Tom Selleck’s real-life father, Robert Selleck, plays Magnum’s grandfather during the investigator’s homecoming on “Magnum, P.I.” (4 p.m. Thursday, KTLA). Tony winner Gwen Verdon plays Magnum’s mother.

Beau Bridges is a young athlete who needs an operation that his father doesn’t want him to have on the first of a two-part “Ben Casey” called “The Echo of a Silent Cheer” (3 a.m. Saturday, KDOC).