Watch S12, EP12: The Propagation Proposition with Fubo for $0 Today
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.
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.
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The Big Bang Theory
S3, EP12 "The Psychic Vortex"Sheldon and Koothrappali attend a university mixer; Leonard discovers that Penny believes in psychics.
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S3, EP13 "The Bozeman Reaction"After their apartment is robbed, Leonard and Sheldon turn to their friends to create a state-of-the-art security system.
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S3, EP14 "The Einstein Approximation"Sheldon tries to figure out the answer to a physics problem by working with Penny.
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S3, EP15 "The Large Hadron Collision"Leonard must choose who to bring with him when he goes to see the Large Hadron Collider on Valentine's Day.
The Big Bang Theory
S3, EP13 "The Bozeman Reaction"After their apartment is robbed, Leonard and Sheldon turn to their friends to create a state-of-the-art security system.
The Big Bang Theory
S3, EP12 "The Psychic Vortex"Sheldon and Koothrappali attend a university mixer; Leonard discovers that Penny believes in psychics.
The Big Bang Theory
S3, EP11 "The Maternal Congruence"Leonard is horrified when his mother (Christine Baranski) visits.
The Big Bang Theory
S3, EP10 "The Gorilla Experiment"Sheldon tries to help Penny understand Leonard's work; Wolowitz gets jealous when Leonard starts hanging out with his new girlfriend.
