The Big Bang Theory - Season 4, Episode 14: The Thespian Catalyst

The Big Bang Theory - Season 4, Episode 14: The Thespian Catalyst
Channel: CBS
Air Date: 3 February 2011

Sheldon (Jim Parsons) feeling that he did a good job as an instructor was enlighted when he read some of the students tweets. Feeling bad about his lack of talent in teaching he asks Penny (Kaley Cuoco) for acting lessons meanwhile Raj (Kunal Nayyar) has been having impure thoughts about Howard's (Simon Helberg) girlfriend Bernadette (Melissa Rauch).

The Big Bang Theory - Season 4, Episode 10: The Alien Parasite Hypothesis

The Big Bang Theory - Season 4, Episode 10: The Alien Parasite Hypothesis
Channel: CBS
Air Date: 9 December 2010

While having dinner with Penny (Kaley Cuoco) and Bernadette (Melissa Rauch), Amy (Mayim Bialik) see's Penny's ex and it makes her feel something that she has never felt before. Sheldon (Jim Parsons) on the other hand try and help to figure out what this new emotion Amy (Mayim Bialik) is feeling. Raj (Kunal Nayyar) and Wolowitz (Simon Helberg) on the other square off to prove who is the real superhero and who is the sidekick.

The Big Bang Theory - Season 4, Episode 8: The 21-Second Excitation

While waiting in line to watch the extended version of an Indiana Jones movie Sheldon (Jim Parsons), Howard (Simon Helberg), Leonard (Johnny Galecki) and Raj (Kunal Nayyar) have another unpleasant encounter with Will Wheaton. All the while Penny (Kaley Cuoco), Bernadette (Melissa Rauch) and Amy (Mayim Bialik) try to have fun on their girls night out.

Channel: CBS
Air Date: 11 November 2010