Episode Titles: Propagation
You are viewing a list of 1 The Big Bang Theory episode featuring "Propagation" in their title.
The Propagation Proposition
Season 12, Episode 12 - Aired January 10, 2019
After Penny runs into Zack at a bar, she and Leonard are invited to dinner on his boat where Zack and his wife ask them for an unusual favor. Meanwhile, Raj tries to patch things up with Anu.