Episode Titles: Mystery
You are viewing a list of 1 The Big Bang Theory episode featuring "Mystery" in their title.
Season 9, Episode 8 - The Mystery Date Observation
Aired November 12, 2015
Sheldon, Wolowitz and Koothrappali post an online advertisement to find Sheldon a new girlfriend. Also, when Amy is coy with details about a guy she is dating, Penny and Bernadette decide to spy.