What to Watch

FRIDAY, 4/27
Great Performances: The Orchestra
Six music videos that won't turn up on MTV: Using high-definition video, avant-garde director Zbigniew Rybczynski creates short films set to classical pieces from Schubert's ''Ave Maria'' to Ravel's ''Bolero.'' PBS (9-10 p.m.)

Czeslaw Milosz: The Poet Remembers (See review.)

The Days and Nights of Molly Dodd
A pregnant pause: Molly takes a break from prenatal worries to follow Hawthorne (Richard Lawson) on his daily detective rounds for her new book project. LIF (10-10:30 p.m.)

SATURDAY, 4/28

In Living Color (See review.)

Tour of Duty
The tour (and possibly the series) comes to an end as Percell, Ruiz, and McKay go on their final rescue mission and then return to the United States, where they face rough readjustments to life out of combat. CBS (9-11 p.m.)

SUNDAY, 4/29

Movie: Fall from Grace (See review.)

Movie: The Story of the Beach Boys: Summer Dreams (See review.)

Movie: Caroline? (See review.)

Masterpiece Theatre: Traffik
Not your standard Masterpiece: In the second part of this absorbing, realistic thriller about the heroin trade, Helen (Lindsay Duncan) must act to save her husband's crumbling empire. PBS (9-10 p.m.) A-

MONDAY, 4/30

Newhart
The increasingly surreal series gets a new time for its final four episodes: Tonight, Dick plays cards with Larry, Darryl, and Darryl and insults their poker buddy Tim Conway. CBS (8:30-9 p.m.)

Working Girl (See review.)

China Beach
In the season closer, McMurphy and Beckett say good-bye to the Beach with a rock & roll respite that takes them to Firebase Geronimo. Sugar and the Creamers (Katrina and the Waves) sing ''We Gotta Get Out of this Place.'' ABC (9-10 p.m.)

Inside Gorbachev's USSR with Hedrick Smith
The author of The Russians is the host of a four-part documentary shot in the USSR. Tonight's show, ''The Taste of Democracy,'' examines Soviet citizens' reactions to reforms. PBS (9-10 p.m.)

Alien Nation
Cathy (Terri Treas) discovers an Overseer plot that may involve the abuse of Newcomer children in a prelude to next week's season finale. Fox (9-10 p.m.)

Murphy Brown
The fax speak for themselves: Someone has been sending passionate electronic love notes to Miles Silverberg, and Murphy has been responding in his name. CBS (9-9:30 p.m.)

I Love Lucy: The Very First Show
The unaired, recently discovered 34-minute pilot for I Love Lucy — a pre-Fred and Ethel Mertz story in which Ricky auditions for a TV show and Lucy tries to get in on the act — is unveiled in an hour-long special. CBS (10-11 p.m.)

Wiseguy
If you missed it in 1987, catch up now: In his first case for the OCB, Vinnie infiltrates the empire of mobster Sonny Steelgrave (Ray Sharkey). Continues weeknights through May 10. CBS (11:30 p.m.-12:30 a.m.)