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Penny's ex-boyfriend Zack learns that he is infertile, so he asks Leonard for help; Koothrappali attempts to mend things with his ex-fiancee Anu.

Starring: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
More
Original Air Date: Jan 10, 2019

Penny's ex-boyfriend Zack learns that he is infertile, so he asks Leonard for help; Koothrappali attempts to mend things with his ex-fiancee Anu.

Starring: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
More
Original Air Date: Jan 10, 2019

How to watch

More episodes

FOX • Today, 11:00pm • 30m

The Big Bang Theory

S4, EP17 "The Toast Derivation"

Sheldon is upset when he realizes Leonard is the center of their group of friends.

FOX • Today, 11:30pm • 30m

The Big Bang Theory

S12, EP22 "The Maternal Conclusion"

Leonard is pleasantly surprised when Beverly comes to visit, and she's genuinely kind to him, until he finds out the real reason she's there; Denise and Stuart overstay their welcome at the Wolowitz house.

Nickelodeon • Tomorrow, 2:01am • 37m

The Big Bang Theory

S9, EP17 "The Celebration Experimentation"

For the first time in nine years, the gang celebrates Sheldon's birthday -- surprising him with a special guest.

Nickelodeon • Tomorrow, 2:38am • 37m

The Big Bang Theory

S9, EP18 "The Application Deterioration"

Leonard, Sheldon and Wolowitz file for a patent on their new invention; Penny, Amy and Bernadette give dating advice to Koothrappali after his breakup with Emily.

Mensa-fied best friends and roommates Leonard and Sheldon, physicists who work at the California Institute of Technology, may be able to tell everybody more than they want to know about quantum physics, but getting through most basic social situations, especially ones involving women, totally baffles them. How lucky, then, that babe-alicious waitress/aspiring actress Penny moves in next door. Frequently seen hanging out with Leonard and Sheldon are friends and fellow Caltech scientists Wolowitz and Koothrappali. Will worlds collide? Does Einstein theorize in the woods?
Starring: Brian George, Christine Baranski, Jim Parsons, John Ross Bowie, Johnny Galecki, Kaley Cuoco, Kaley Cuoco-Sweeting, Kevin Sussman, Kunal Nayyar, Laura Spencer, Mayim Bialik, Melissa Rauch, Sara Gilbert, Simon Helberg, Wil Wheaton
Original Air Date: Sep 24, 2007
Genres: ComedyTV Series
Rating: TVPG
Playback: HD
4 seasons available on demand
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