THE FBI PURSUES A SNIPER WHO IS CAUSING WIDESPREAD PANIC IN LOS ANGELES AFTER FOUR PEOPLE ARE KILLED, ON "NUMB3RS," FRIDAY, APRIL 15

Lou Diamond Phillips ("La Bamba") Guest Stars

"Sniper Zero" -- Don and his team must stop a sniper who goes on a killing spree in Los Angeles, on Numb3rs, Friday, April 15 (10:00-11:00 PM, ET/PT) on the CBS Television Network. Miller Tobin directed the episode written by Ken Sanzel.

Lou Diamond Phillips ("La Bamba") guest stars as Quantico's senior sniper instructor, Agent Edgerton.

Pressed for time to find the sniper, Don calls in a senior Sniper Instructor from Quantico (guest star Lou Diamond Phillips) to assist on the case, causing Charlie to feel insecure about his role as special consultant to the FBI. Feeling animosity towards Agent Edgerton at first, Charlie learns from him that human behavior could make his mathematical equations useless. Instead Edgerton encourages Charlie to get inside the head of the killer.

Don Eppes: Rob Morrow
Charlie Eppes: David Krumholtz
Alan Eppes: Judd Hirsch
Terry Lake: Sabrina Lloyd
David Sinclair: Alimi Ballard
Larry Fleinhardt: Peter MacNicol
Amita Ramajuan: Navi Rawat
Agent Edgerton: Lou Diamond Phillips
Big Mama: Heather Lee
Walter: Don Fischer
Susan Meyers: Arabella Field
Marion Crane: Jayne Taini
Swat Leader: Lamont Holmes
Wayne Osborne: Franc Ross
Nathan Crane: Nathanael Johnson
Swat Leader #2: Troy Argall

RATING: To Be Announced