A TRAIN TRIP TO SAN FRANCISCO TAKES A MAJOR DETOUR WHEN THE GUYS DISCOVER BEAUTIFUL SCI-FI ACTRESS SUMMER GLAU IS ONBOARD, ON A REBROADCAST OF "THE BIG BANG THEORY," MONDAY, DEC. 28

Dr. George Smoot, Nobel Laureate and Father of the Big Bang Theory of Creation, Also Makes a Cameo

"The Terminator Decoupling" - A train trip to San Francisco takes a major detour when Leonard (Johnny Galecki), Sheldon (Jim Parsons), Wolowitz (Simon Helberg) and Raj (Kunal Nayyar) discover that beautiful sci-fi actress Summer Glau ("Terminator: The Sarah Connor Chronicles") is onboard, on a rebroadcast of THE BIG BANG THEORY, Monday, Dec. 28 (9:31-10:00 PM, ET/PT) on the CBS Television Network. The episode also features a cameo by Nobel Laureate Dr. George Smoot. (Originally broadcast 3/9/09)

Summer Glau is well known to television audiences for her roles in "Terminator: The Sarah Connor Chronicles" and "Firefly." A sci-fi favorite, Glau is a two-time Saturn Award winner and a Teen Choice Award nominee.

Dr. George Smoot, recipient of the Nobel Prize in Physics as well as the Einstein Medal, is one of the world's most renowned astrophysicists. His research helped cement the Big Bang theory of the universe.

SERIES REGULARS:

Leonard................................... Johnny Galecki
Sheldon......................................... Jim Parsons
Penny.......................................... Kaley Cuoco
Wolowitz.................................. Simon Helberg
Koothrappali.............................. Kunal Nayyar

GUEST CAST:

As herself.................................... Summer Glau
As himself........................... Dr. George Smoot

STORY BY: Bill Prady & Dave Goetsch

TELEPLAY BY: Tim Doyle & Stephen Engel

DIRECTED BY: Mark Cendrowski

RATING: TV14-DL