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.
How to watch
More episodes
The Big Bang Theory
S12, EP12 "The Propagation Proposition"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.
The Big Bang Theory
S2, EP21 "The Vegas Renormalization"Koothrappali and Leonard take Wolowitz to Las Vegas; Sheldon is forced to bunk with Penny when he gets locked out of his apartment.
The Big Bang Theory
S12, EP6 "The Imitation Perturbation"When Wolowitz dresses up as Sheldon for Halloween, Sheldon seeks retaliation at Leonard and Penny's Halloween party; Leonard is shocked when Penny doesn't remember their first kiss.
The Big Bang Theory
S4, EP6 "The Irish Pub Formulation"Leonard keeps an affair a secret from Sheldon, Howard and Raj.
The Big Bang Theory
S8, EP1 "The Locomotion Interruption"Leonard and Amy make an unexpected trip to Arizona to fetch Sheldon; Penny interviews for a job at Bernadette's company; Stuart's relationship with Mrs. Wolowitz disturbs Howard.
