The Big Bang Theory is on hiatus this week, but it will return with new episodes on February 3.  Koothrappali fantasizes about a big song and dance number with his best friend's girlfriend and Sheldon asks Penny to give him acting lessons.  Below are promo photos and a synopsis for the February 3 episode.

SHELDON WANTS PENNY TO GIVE HIM ACTING LESSONS, ON "THE BIG BANG THEORY," THURSDAY, FEB. 3

"The Thespian Catalyst" - Sheldon hopes acting lessons from Penny will help him become a better teacher. Meanwhile, Koothrappali fantasizes about his best friend's girlfriend, on THE BIG BANG THEORY, Thursday, Feb. 3 (8:00-8:31 PM, ET/PT) on the CBS Television Network.

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

RECURRING CAST:
Bernadette......................................................... Melissa Rauch
Amy.................................................................... Mayim Bialik

STORY BY: Chuck Lorre & Lee Aronsohn & Jim Reynolds
TELEPLAY BY: Bill Prady & Steven Molaro & Maria Ferrari
DIRECTED BY: Mark Cendrowski

THE BIG BANG THEORY

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"The Thespian Catalyst" -- Sheldon hopes acting lessons from Penny will help him become a better teacher, while Koothrappali (Kunal Nayyar, center) fantasizes about his best friend's girlfriend (Melissa Rauch, left), on THE BIG BANG THEORY, Thursday, Feb. 3 (8:00-8:31 PM, ET/PT) on the CBS Television Network. Also pictured: Johnny Galecki, right.Photo: Sonja Flemming/CBS© CBS Broadcasting Inc. All Rights Reserved.