DON AND HIS TEAM INVESTIGATE THE POSSIBILITY OF AN ENVIRONMENTAL CRIME WHEN A SINKHOLE COLLAPSES UNDER A PLAYGROUND, KILLING A WOMAN AND INJURING SEVERAL CHILDREN, ON A REBROADCAST OF "NUMB3RS," FRIDAY, APRIL 20, 10:00-11:00 PM, ET/PT

Joshua Malina ("The West Wing") Guests Stars as Assistant US Attorney Howard Meeks

"Waste Not" -- Don and his team investigate a trail of illegal waste disposal after a sinkhole, which collapses in a school playground, kills an elderly woman and injures several children, on a rebroadcast of NUMB3RS, Friday, April 20 (10:00-11:00 PM, ET/PT) on the CBS Television Network. Julie Herbert directed the episode which is written by J. Miller Tobin. (Originally broadcast 11/17/06)

Joshua Malina ("The West Wing") guests stars as Assistant US Attorney Howard Meeks.

As the FBI tries to prove that a corrupt construction company is to blame because they have been burying containers of toxic waste under school playgrounds, they discover that the students in the school have a higher rate of cancer and neurological problems. Charlie tries to mathematically prove cause and effect between the pavement materials and the cancer clusters. Meanwhile, Millie, Charlie's new boss at Cal Sci, orders him to spend less time helping out the FBI and more time in their department.

SERIES REGULARS:

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

RECURRING CAST:

Dr. Mildred French: Kathy Najimy

GUEST STARS:

Howard Meeks: Joshua Malina
Duke Piermint: Russell Andrews
Principal Riva Bell: Erica Gimbel
Malik Shabaz: Terrence Hardy
Trudy Perez: Christine Avila
Provost: Julian Barnes
Agent Davidson: Joel Stoffer
Daria Samson: Deirdre Lovejoy
Amos Shabaz: Larry Gilliard, Jr.
Reed Parkman: Gabriel Olds
Mr. Bowden: Kim Estes
Boyd Resnick: Bob Gunton
Technician: Matthew Yang King
Battered kid: Cesar Flores

RATING: TV-PG-L