19 Wednesday Beverly Hills, 90210 (Fox, 8-10 p.m.) Bradymania: A Very Brady Special (ABC, 8-9 p.m.) Two must-watch events for different generations: Teens will be glued to 90210's season finale, in which the West Beverly gang finally graduates, while twentysomethings won't want to miss Florence Henderson and other erstwhile Bradys sharing memories of the landmark '70s sitcom. 20 Thursday Seinfeld (NBC, 8-9 p.m.) The NBC pilot plot line thickens in the season-ending climax: George (Jason Alexander) balks at the nerdy actor (The Larry Sanders Show's Jeremy Piven) cast to play him, but there's a bigger problem-Crazy Joe Davola (Peter Crombie) is on the loose in the studio.
Last Call! A Cheers Celebration (NBC, 9-9:22 p.m.) Cheers (NBC, 9:22-11 p.m.) the tonight show with jay leno (NBC, 11:35 p.m.-12:35 a.m.) Milking the Cheers send-off for every possible second of ad time, NBC bookends the 98-minute final episode with a clipfest warm-up and (following local news) Jay Leno, live from Bos-ton's Bull & Finch pub with the series' cast.
21 Friday The Road to Hollywood (NBC, 8-9 p.m.) Movie: Perry mason: the case of the telltale talk show host (NBC, 9-11 p.m.) Tony Danza is NBC's answer to Baba Wawa? Apparently so-the former Taxi lug introduces interviews with Sharon Stone, Eddie Murphy, and Arnold Schwarzenegger about their paths to glory. Then, pro talkers Regis Philbin (victim) and Montel Williams (suspect) appear in Raymond Burr's latest courtroom workout.
Brady Bunch Midnight Marathon Madness (TBS, 12:05-6:30 a.m. ) A Bradymaniac's dream: 13 back-to-back Bunch epi-sodes, including ''Greg Gets Grounded,'' ''Dear Libby,'' and ''Getting Davy Jones.''
22 Saturday Dr. Quinn, Medicine Woman (CBS, 8-9 p.m.) Willie Nelson: The Big Six-O: An All-Star Birthday Celebration (CBS, 9-11 p.m.) A pair of country-music graybeards. First, Doc Quinn is visited by Kenny Rog-ers, who plays a Civil War-era photographer who is going blind (from diabetes, not from his phone-sex tapes). Later, sexagenarian Willie Nelson is saluted by Paul Simon, Ray Charles, Bonnie Raitt, and Travis Tritt.
Saved By the Bell (NBC, 8-9 p.m.) The Saturday-morning Bell boys and girls don caps and gowns before heading off to college (and a possible prime-time series next fall).
Movie: Scam (Showtime, 9-11 p.m.) See review on page 38.
23 Sunday Life Goes On (ABC, 7-8 p.m.) The series' Final Episode finds Becca (Kellie Martin) breaking up with HIV-positive Jesse (Chad Lowe) on the eve of her graduation.
Diana Ross Sings Jazz and Blues: Stolen Moments (Disney, 9-10 p.m.) Movie: Judith Krantz's Torch Song (ABC, 9-11 p.m.) Michael Jackson's role model turns herself into a torch singer with renditions of ''The Man I Love'' and ''All of Me,'' while Torch Song tells a tale similar to that of Mike's pal Liz Taylor-an alcoholic movie star (Raquel Welch) enters a rehab clinic and falls in love with a blue-collar hunk (Jack Scalia). (See story on page 11.)
