Sheldon Cooper will try his luck in finding love and takes to online dating, seeking help from Rajesh Koothrappali and Howard Wolowitz, in the upcoming chapter of The Big Bang Theory season 9.Episode 8 is titled, The Mystery Date Observation, which will air this Thursday, 12 November at 8pm EST on CBS Network.

Penny gets angry, assuming Leonard proposed this to avoid being stuck with her.

The teams are Sheldon and Penny, Howard and Amy, and Leonard and Bernadette.

Bursting into Penny's place to catch her in the act, he and Amy find Leonard there.

Sheldon gets mad at Leonard for not telling him he is home, and refuses to believe anything he says, though with Howard's help they eventually reconcile.

Sheldon's "secret" is disliking You Tube's new rating system - trivial to Penny, who almost leaves in annoyance, but stays and apologizes on realizing she hurt Sheldon's feelings. He insists he is not hitting on her, but later tells Howard they "had a moment".

At a biology convention, Amy and Bernadette are surprised when two men buy them drinks.Now that I am looking for my next girlfriend, it seemed only logical that I employ your services once again.""You sure, you're up for that? But Sheldon says that he is okay with it, and he describes his time with Amy as "a stick of fruit striped gum, sweet and enjoyable at first but ultimately a flavorless lump of sadness".The seventh season of the American sitcom The Big Bang Theory aired on CBS from September 26, 2013, to May 15, 2014.Bernadette implies Amy's enthusiasm stems from her hunger for romantic affection from Sheldon, but they make up until Bernadette reveals she was attracted to the man resembling Sheldon, Amy preferring the one resembling Howard.Leonard surprises Penny by arriving back early and hiding in her apartment.Kaley Cuoco was credited as "Kaley Cuoco-Sweeting" from "The Convention Conundrum" and onwards after her wedding with Ryan Sweeting on December 31, 2013.