Katee Sackhoff
The Battlestar Galactica tough girl kept it tough with her recurring role as Det. Frankie Reed.
John Michael Higgins
The Happily Divorced star appeared as the owner of a company that makes people's fantasies come true.
Anthony LaPaglia
Crossover time! The actor plays his Without a Trace character, Jack Malone, hunting down a kidnapper.
Marlee Matlin
The Oscar winner played an ex-flame of Grissom's—aka, a nemesis of Sara's—who is suspected of murder.
Christopher Gorham
The Covert Affairs star played the grandson of a victim who may not be as innocent as he seems.
Michael K. Williams
The Boardwalk Empire star (and The Wire's Omar Little) has appeared in two roles in two different seasons on the show: a methhead pal of Det. Jim Brass' hooker daughter in season five and a fugitive Rwandan war criminal in season 10.
Holly Madison
The Peep Show star played herself when a shark attack in a hotel pool took the crime lab team to the Vegas Strip. Elliot Gould, Method Man and Canadian prog-rocker Deadmau5 were also in the episode.
Judd Nelson
The Brat Pack star played a movie exec with a drug problem—and a dead assistant.
DJ Qualls
The Hustle & Flow star played the recovering-addict nephew of the Dollhouse Killer's second victim.
Kevin Federline
K-Fed played a perp who ran a ring of teenage hoodlums. Their idea of a good time? Beating their victims to death.
Elizabeth Berkley
The Showgirls star returned to Vegas to play a foam dancer.
Travis Barker, Akon, Obie Trice & Method Man
The quartet played...wait for it...hip-hop artists when the crime lab team descended into Vegas' underground hip-hop world to...wait for it...investigate a murder. Method Man's Drops showed up again in season eight as a person of interest in a shooting, despite being in jail.
Shanna Moakler
Barker's other half appeared in the same ep, playing her hubby's assistant.
Bill Irwin
The actor known to most parents as Elmo's friend Mr. Noodles had a recurring role as serial killer Nate Haskell.
Octavia Spencer
The Help star appeared as a friend of Method Man's Drops when the gangster was briefly released from prison to help with an investigation.
Page Kennedy
The Desperate Housewives actor appeared as rapper Dollar, who gets caught in quite a compromising position.
Tony Curtis
The music legend made a cameo as himself. We wouldn't have it any other way.
Dita Von Teese
Marilyn Manson's ex-wife plays a school teacher who moonlights as—shocker!—a burlesque dancer and murder suspect.
Danny Bonaduce
The star played an aging rocker—and the first on the Dollhouse Killer's victims.
Roger Daltrey
The Who frontman played mob boss Mickey Dunn, whose death set off a string of murders in which the victims were found alongside photos of themselves with Dunn. Like the forensics experts we had become by season seven, we sensed a connection immediately.
Faye Dunaway
The Hollywood legend played a guest at a high-society party who turns out to be the real target when a young waiter gets killed.
Carrot Top
The inexplicably successful comedian was discovered tied up—but unharmed—in the back of a limo as the team investigated a woman's murder with a Hangover-gone-wrong sort of twist.