When Penny and Bernadette go to San Diego for a pharmaceutical sales convention, Wolowitz is in charge of the kids. Also, Sheldon finds a book on experimenting on kids, and the guys plus Amy make a day of it.
The Big Bang Theory, The Big Bang Theory Season 12
Actor: Kaley Cuoco, Johnny Galecki, Jim Parsons, Simon Helberg, Melissa Rauch, Kunal Nayyar, Mayim Bialik
Quality: HD 720p