WWKffiKffi. ffiffiK $L'fldDAY, MAY 17 \" "lndianapolis 5OO" The 91st year for the most famous automotive racing event in America, with three women vying to lle the first female to win it all. (ABC, I p m ) r:i-: "National Memorial Day Concert" Actors cary Sinise and loe l\rantegna host this annual concert on the West Lawn of the White House Natalie Cole, Rct. cen.</p><p> Colin Powell and Bonnie Hunt will appear (PBS,8 p m ) I.T*I{DAY, F],AY ?8 .."'Star Wars: The Legacy Revealed" Documentary celebrating the 3oth anniversary of thc !andmark fantasy film by insisting on its high-falutin origins and influence Yeah, okay, just show us Boba Fett And Leia in the slave girl outfit.</p><p> Hold the Ewoks, though (History,9 p.m ) ll ('M*A+S+H' Marathon" Don a ntce frock for Men]orial Day and watch 20 episodes worth of Klinger's Sucrion Eigjrt gambils All ttrat. plus meatball surgery (Halln)ark.8 a m.) TUH$SAY" $qAY,3$ tRi\ "gn ,n" LOt" Three rnore wanna-be Scorseses are qiven the final cut in this reality show, wher e the prize is a deal to direct movies for Dreamworks (Fox,8 p m ) $N "The UniverSg" An awfully bis subject is tackted in this new science series, beginning with eclipses, solar storms and the birth of the sun. (History,9 p m ) R\ "Boston Legal" The third-season llnate of the just-renewed series highlights Alan (James Spader) and Denny (william shatner) defending two brothers accused of nlurdering their dad. (ABC, I0 p m ) wsmNgssAV, F.IAY $S "$ "Next Best Thing: Who ls The Greatest Celebrity Impersonator?" t\,lichele l\,4erkin hosts this new series, where contestants try to convince judges and audiences that ihey sound just like so- and-so and thus win $100,000.</p><p> Does Rich Little know he has competition? (ABC, I p-m-) N "Hidden Palms" From rehab to Palm Springs and a noir'ish world of drama: it ain't easy being a teen on the CW in this new series. (CW,8 p n ) T!"{t,ttsffiAY, MAY S1 i$ "Pirate Master" Arrqgshh! Ahoy, mateys, it's the swarthiest reality series on the seven Seas, with 16 buccaneers sailing off in search of boolv, er, trcasure.</p><p> Aye, it's from the creators of "Survivor" That's all the pirate-speak we know Oh, wait, one more: "Shiver me timbers!" (C85, 8 p m ) iil fiNational Spelling Bee" thc flnal rounds of the spelling bee that winnows down 286 competitors lo one champion- That's C-H-A-M..- (ABC,8 p.m.) FRIilA\ JUt'tU r \i "TV's Funniest Moments" tne N.4useum of Television & Radio celebrates TV comedy with clips ranging from "The Honeymooners" to "ln Livinq Color " Five to onc, rve'll be hearing about Chuckles the Clown on "The l,4ary Tyler l\.4oore Show" (Fax, I p m )N "4O Most Softsational Soft-Rock Songs" A countdown of the top tunes that make us cry, from artists like Bread, Styx and, of course, Christopher Cross ("Think of Laura"). c'mon, "Watching Scotty Grow"! (VHL,9 p n.) SATURDAY, JUNE 2 N "Stanley Cup Finals" Put yoursetf in the penatty box if you're not watching hockey's biggest game. (NBC, 8 p.m-) *\ ttMarco Polo" tan Somerhalder goes from being "Lost" to being one of the great explorers in this new TV movie Let's hear it: "Marco.. ?" "Polo!" (Hallmark, S p m ) Michael ciltz