28 Wednesday The Brokaw Report: The Lost Generation (NBC, 9-10 p.m.) The kids aren't all right: Tom Brokaw examines the plight of late-teen and twentysomething slackers who blow off college, mooch from their folks, and sometimes turn to a life of crime.

Delta (ABC, 9:30-10 p.m.) Country-music guest star of the week No. 1: When Delta (Delta Burke) goes on a Thelma & Louise-style road trip with two beauticians, she meets Nashville vixen Tanya Tucker along the way.MTV Unplugged (MTV, 10-10:30 p.m.) The beatniks are coming, the beatniks are coming! Among the selections in the series' first-ever poetry slam: Maggie Estep's ''The Stupid Jerk I'm Obsessed With,'' Reg E. Gaines' ''Please Don't Take My Air Jordans,'' and Henry Rol-lins ''Ode to MTV Unplugged.''

Dream on (HBO, 10:30-11 p.m.) Martin (Brian Benben) gets the hots for his apartment building's sexy new super (Jacob's Ladder's Elizabeth Pena) during a record-breaking heat wave.

29 Thursday our favorite movies: jason and the argonauts (TNT, 8-10 p.m.) Seinfeld's Jason Alexander introduces the effects-packed 1963 film of his mythological namesake's quest for the Golden Fleece: ''You have your Lawrence of Arabias. You have your Gone With the Winds. They pale in comparison to Jason and the Argonauts.''

Taco Bell Presents: Battle of the Bands '93 (ABC, 9-10 p.m.) Hang-in' With Mr. Cooper's Holly Robinson and MTV VJ-who-won't-die Adam Curry cohost a rock-off in which six unknown bands vie for a recording contract. Hey, where's Willie Nelson when Taco Bell really needs him?

Laurence Olivier: A Life (Learning Channel, 10-11 p.m.) The first installment of a tripartite profile of the late Lord Larry, with comments from such Olivier cohorts as Sir John Gielgud, Dame Peggy Ashcroft, and commoner Douglas Fairbanks Jr.

Whose Line Is It Anyway? (Comedy Central, 9:30-10 p.m.) The game show hosted by Brit-wit Clive Anderson and featuring English and American performers acting out skits suggested by audience members returns with nine new epi-sodes taped in London.

30 Friday Johnny Bago (CBS, 10-11 p.m.) Johnny (Peter Dobson) takes a job as a laborer on a rhubarb plantation, where his fellow field hands begin to worship his Winnebago. Two-time Playboy model Joan Severance guest-stars.

Laughing Matters (Showtime, 10-11 p.m.) Sitcoms are explored via a visit to the set of Murphy Brown, while Naked Gunman Leslie Niel-sen surveys silver- screen comedy with Mike Myers, Eddie Murphy, and Penny Marshall.

The Tonight Show With Jay Leno (NBC, 11:35-12:35 p.m.) Prodigal sidekick Ed McMahon returns as a guest, denting the Tonight Show couch for the first time since Johnny Carson's retirement. Yessss!

31 Saturday Movie: Blue Ice (HBO, 8-10 p.m.) Michael Caine stars in this made-for-cable thriller as a British-spy-turned-jazz-joint-owner who gets back into the espionage business after he falls in love with an ambassador's wife (Sean Young).