Matthew Fox topped the ensemble of the Fox hit Party of Five (1994-2000), as everybody knows. But who remembers the starring vehicle he got after that? Only those few of us who watched Haunted, a short- lived 2002 Fox hour about a detective nearly shot dead, who then discovers ghosts can help him solve cases from the other side. And who remembers Fox's first regular TV gig? Even the actor might rather forget Freshman Dorm, a 1992 CBS summer sitcom where he played a student jock living guess-where.

Harold Perrineau, recently returned to Lost as Michael, also had a previous long-running but somewhat lesser-known gig. He starred as the wheelchair-bound former crack addict Augustus Hill on HBO's prison drama Oz (1997-2003), where he also narrated the action. But sharp-eyed smart-TV fans might remember him first from I'll Fly Away (1991-93), NBC's graceful civil-right era drama starring Sam Waterston and Regina Taylor, where near the end of the run he recurred as Robert Evans.

Terry O'Quinn, who plays Locke, has been in the showbiz mix the longest, with credits dating back to 1980. After his scary star-making turn in the '80s movie The Stepfather, he did a laundry list of TV shows, including regular stints in Earth 2 and Millennium. But he was most popularly cast as recurring military men in Harsh Realm, JAG and The West WIng, and also played FBI Assistant Director Kendall in Alias.

Daniel Dae Kim has been busy in recurring roles, too. Angel fans remember him as Gavin Park (2001-03). And on 24 (2003-04), he was a CTU field agent helping Jack Bauer and Chase Edmunds corral the baddies. He also showed up on ER, Enterprise and Miss Match. Kim's first regular gig was in TNT's 1999 space saga Crusade, the Babylon 5 sequel where he played a telepathic lieutenant.

Michael Emerson, the devious Ben Linus, has spent most of his career in theater, but finally hit TV hard in 2000. He grabbed a guest Emmy for several episodes of The Practice, as an intimidating psychiatric patient whose claims to be a serial killer spook the legal crew.

Jorge Garcia may look familiar from another kind of TV series. Our lovable Hurley/Hugo hung around at the diner on Ted Danson's CBS sitcom Becker, playing a lazy friend of blind shoprunner Jake who did pretty much nothing during the show's final season (2003-04).

Elizabeth Mitchell has been all over the map. After her splash as Kerry's girlfriend on ER (2000-01), she ended up in the short-lived summer series The Beast, about a cable TV news service (which also costarred Lost's Naveen Andrews), then on Rob Lowe's political drama The Lyon's Den. Before that, she'd had smaller parts in Significant Others (with Jennifer Garner) and L.A. Firefighters.

Naveen Andrews actually did most of his previous work in his native Britain, starting with 1993's splashy The Buddha of Suburbia (newly out on DVD), a TV movie by Hanif Kureishi (My Beautiful Laundrette) about a half-Indian, half-white kid who finds his own identity in the '70s punk scene amid the upheaval of multicultural immigration.

Dominic Monaghan has a big British TV credit, too, playing the teenage deliquent sidekick of the elderly housewife detective in Patricia Routledge's Hetty Wainthropp Investigates (1996-98).