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 HOWARD AND BERNADETTE WELCOME THEIR NEW BABY, ON "THE BIG BANG THEORY," THURSDAY, DEC. 15
 "The Birthday Synchronicity"- Howard and Bernadette welcome their new baby and Sheldon and Amy celebrate Amy's birthday, on THE BIG BANG THEORY, Thursday, Dec. 15 (8:00-8:31 PM, ET/PT) on the CBS Television Network.
 REGULAR CAST:
 Johnny Galecki
(Leonard) 
Jim Parsons
(Sheldon) 
Kaley Cuoco
(Penny) 
Simon Helberg
(Wolowitz) 
Kunal Nayyar
(Koothrappali) 
Mayim Bialik
(Amy) 
Melissa Rauch
(Bernadette) 
RECURRING CAST:
Kevin Sussman
(Stuart) 
 GUEST CAST:
 Vernee Watson
(Althea) 
Pamela Adlon
(Halley) 
 STORY BY: Chuck Lorre, Steve Holland, Maria Ferrari
 TELEPLAY BY: Steve Molaro, Eric Kaplan, Tara Hernandez
 DIRECTED BY: Nikki Lorre
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