WHEN LEONARD AND PENNY FIGHT, SHELDON PLAYS THE UNLIKELY PEACEMAKER, ON "THE BIG BANG THEORY," THURSDAY, JAN. 19

"The Romance Recalibration"- When Penny feels that Leonard is taking her for granted, she decides to go on a spa weekend with Amy. Also, Wolowitz and Koothrappali try to fix a squeaky floorboard in the baby's room, on THE BIG BANG THEORY, Thursday, Jan. 19 (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)

STORY BY: Chuck Lorre, Dave Goetsch, Anthony Del Broccolo

TELEPLAY BY: Steven Molaro, Steve Holland, Saladin K. Patterson

DIRECTED BY: Mark Cendrowski