11 Moments from "The Comic Book Store Regeneration"

"The Comic Book Store Regeneration"

Penny teaches Sheldon (Jim Parsons, left) how to "let it go," but can't follow her own advice after she learns something infuriating about Amy, (Mayim Bialik, right) on THE BIG BANG THEORY, Thursday, Feb. 19 (8:00-8:31 PM, ET/PT), on the CBS Television Network. Photo: Monty Brinton/CBS ©2015 CBS Broadcasting, Inc. All Rights Reserved
Sheldon's nemesis giving Amy some wine

Sheldon's nemesis giving Amy some wine

Penny teaches Sheldon (Jim Parsons, left) how to "let it go," but can't follow her own advice after she learns something infuriating about Amy, (Mayim Bialik, right) on THE BIG BANG THEORY, Thursday, Feb. 19 (8:00-8:31 PM, ET/PT), on the CBS Television Network. Also pictured: John Ross Bowie (center) Photo: Monty Brinton/CBS ©2015 CBS Broadcasting, Inc. All Rights Reserved
Stuart re-opens his comic book store

Stuart re-opens his comic book store

Wolowitz receives some shocking news as everyone prepares for the reopening of Stuart's (Kevin Sussman) comic book store, on THE BIG BANG THEORY, Thursday, Feb. 19 (8:00-8:31 PM, ET/PT), on the CBS Television Network. Photo: Monty Brinton/CBS ©2015 CBS Broadcasting, Inc. All Rights Reserved
At the comic book store

At the comic book store

Wolowitz (Simon Helberg, center) receives some shocking news as everyone prepares for the reopening of Stuart's (Kevin Sussman, left) comic book store, on THE BIG BANG THEORY, Thursday, Feb. 19 (8:00-8:31 PM, ET/PT), on the CBS Television Network. Also pictured: Melissa Rauch (right) Photo: Monty Brinton/CBS ©2015 CBS Broadcasting, Inc. All Rights Reserved
Penny gives Sheldon advice

Penny gives Sheldon advice

Penny (Kaley Cuoco-Sweeting, left) teaches Sheldon (Jim Parsons, right) how to "let it go," but can't follow her own advice after she learns something infuriating about Amy, on THE BIG BANG THEORY, Thursday, Feb. 19 (8:00-8:31 PM, ET/PT), on the CBS Television Network. Photo: Monty Brinton/CBS ©2015 CBS Broadcasting, Inc. All Rights Reserved
Wolowitz learns some shocking news

Wolowitz learns some shocking news

Wolowitz (Simon Helberg, right) receives some shocking news as everyone prepares for the reopening of Stuart's comic book store, on THE BIG BANG THEORY, Thursday, Feb. 19 (8:00-8:31 PM, ET/PT), on the CBS Television Network. Also pictured: Melissa Rauch (left) Photo: Monty Brinton/CBS ©2015 CBS Broadcasting, Inc. All Rights Reserved
Penny folds laundry while talking to Sheldon

Penny folds laundry while talking to Sheldon

Penny (Kaley Cuoco-Sweeting, left) teaches Sheldon (Jim Parsons, right) how to "let it go," but can't follow her own advice after she learns something infuriating about Amy, on THE BIG BANG THEORY, Thursday, Feb. 19 (8:00-8:31 PM, ET/PT), on the CBS Television Network. Photo: Monty Brinton/CBS ©2015 CBS Broadcasting, Inc. All Rights Reserved
Penny, Amy and Sheldon

Penny, Amy and Sheldon

Penny (Kaley Cuoco-Sweeting, left) teaches Sheldon (Jim Parsons, right) how to "let it go," but can't follow her own advice after she learns something infuriating about Amy, (Mayim Bialik, center) on THE BIG BANG THEORY, Thursday, Feb. 19 (8:00-8:31 PM, ET/PT), on the CBS Television Network. Photo: Monty Brinton/CBS ©2015 CBS Broadcasting, Inc. All Rights Reserved
Raising a glass

Raising a glass

Wolowitz receives some shocking news as everyone prepares for the reopening of Stuart's comic book store, on THE BIG BANG THEORY, Thursday, Feb. 19 (8:00-8:31 PM, ET/PT), on the CBS Television Network. Pictured left to right: Kunal Nayyar, Kevin Sussman, Mayim Bialik, Jim Parsons, Johnny Galecki, and Kaley Cuoco-Sweeting, Photo: Monty Brinton/CBS ©2015 CBS Broadcasting, Inc. All Rights Reserved
Taking a selfie with Nathan Fillion

Taking a selfie with Nathan Fillion

Leonard (Johnny Galecki, center) and Raj (Kunal Nayyar, right) think they spot Nathan Fillion (Nathan Fillion, left) at a restaurant, on THE BIG BANG THEORY, Thursday, Feb. 19 (8:00-8:31 PM, ET/PT), on the CBS Television Network. Photo: Michael Yarish/Warner Bros. Entertainment Inc. © 2015 WBEI. All rights reserved.
Nathan Fillion guest stars

Nathan Fillion guest stars

Leonard (Johnny Galecki, center) and Raj (Kunal Nayyar, right) think they spot Nathan Fillion (Nathan Fillion, left) at a restaurant, on THE BIG BANG THEORY, Thursday, Feb. 19 (8:00-8:31 PM, ET/PT), on the CBS Television Network. Photo: Michael Yarish/Warner Bros. Entertainment Inc. © 2015 WBEI. All rights reserved.