DON AND MEGAN MUST FIND A DISGRUNTLED FORMER EMPLOYEE OF A PHARMACEUTICAL COMPANY WHO IS TAMPERING WITH OVER-THE-COUNTER MEDICATIONS, ON A REBROADCAST OF "NUMB3RS," FRIDAY, MAY 26

Lou Diamond Phillips ("La Bamba") Guest Stars

"Toxin" -- A former chemist of a large pharmaceutical company is discovered to be tampering with medication and Don and Megan must track him down, on a rebroadcast of NUMB3RS, Friday, May 26 (10:00-11:00 PM, ET/PT) on the CBS Television Network. Jefery Levy directed the episode written by Ken Sanzel. (Originally broadcast 11/25/05)

Lou Diamond Phillips ("La Bamba") reprises his role as Special Agent Ian Edgerton.

When several people in Los Angeles suffer from seizures as a result of product tampering of over-the-counter medications, Don and his team discover that a former chemist from a large pharmaceutical company is to blame. While tracing the culprit to the Sibley mountains, the team meets up with Special Agent Edgerton (Lou Diamond Phillips), who is tracking a cattle rancher-turned-federal fugitive for selling tainted beef and killing a U.S. Marshall. Megan figures out that their meeting isn't random, as the two fugitives have something in common.

Don Eppes: Rob Morrow
Charlie Eppes: David Krumholtz
Alan Eppes: Judd Hirsch
David Sinclair: Alimi Ballard
Larry Fleinhardt: Peter MacNicol
Megan Reeves: Diane Farr
Colby Granger: Dylan Bruno
Agent Ian Edgerton: Lou Diamond Phillips
Bob McHugh: Connor Trinneer
Bill Yardley: Patrick O'Connell
Rob Evans: Nick Kiriazis
Taylor Brindell: Mark Harelik
Tate Gilliam: Owiso Odera
Wife: Elyse Marie Mirto
Mrs. McHugh: Cynthia Preston
Sheriff's Deputy: Kristin Proctor

RATING: TVPG-LV