DON AND THE FBI INVESTIGATE THE MYSTERIOUS DEATH OF A MIXED-MARTIAL ARTS FIGHTER AFTER HE DIES IN THE RING WHILE TRAINING WITH HIS SPARRING PARTNER, ON A REBROADCAST OF "NUMB3RS," FRIDAY, JULY 20

Tito Ortiz, a Former Light-Weight Ultimate Fighting Champion Player, Guest Stars as Tino Alva, the Defending Champ in the All-Out Fighting League

"Contenders" -- When a competitive mixed-martial arts fighter dies suspiciously in the ring while training for a championship match, the victim's sparring partner, who also happens to be friends with David, becomes the prime suspect, on a rebroadcast of NUMB3RS, Friday, July 20 (10:00-11:00 PM, ET/PT) on the CBS Television Network. David Harden wrote script which was directed by Alex Zakrzewski. (Originally broadcast 2/16/07)

Tito Ortiz, a former light-heavy-weight Ultimate Fighting Champion player, guest stars as Tino Alva, the defending champion in the all-Out Fighting League

David's friend, Ben, becomes the main suspect after the FBI learns that the victim was poisoned, and another fighter who sparred with him also died in the ring while training. David and the FBI try to find evidence to clear Ben even though they believe that he might be knocking off the competition to improve his ranking in the league. Meanwhile, Charlie tries to fulfill a promise made to Larry to enter Cal Sci's poker tournament to defend Larry's title against his longtime poker nemesis.

SERIES REGULARS:

Don Eppes: Rob Morrow
Charlie Eppes: David Krumholtz
Alan Eppes: Judd Hirsch
David Sinclair: Alimi Ballard
Megan Reeves: Diane Farr
Amita Ramanujan: Navi Rawat
Colby Granger: Dylan Bruno

GUEST CAST:

Claudia Gomez: Lauren Velez
Ben Ellis: Grenga Akinngbe
Larry Alston: Bruce McGill
Detective Graham Larson: Steven Culp
Professor Stanley Novich: Arye Gross
Tino Alva: Tito Ortiz
Reporter: A.J. Benza
Munson's Trainer: Philip Moon
Announcer: Bill Seward
Dealer: Fred Warner

RATING: TV-PG