Episode 4.21 "The Agreement Dissection" has Priya using her legal skills to nullify Leonard and Sheldon's Roommate Agreement. Sheldon gets his revenge when he makes Leonard sign a new Roommate Agreement to stop Sheldon telling Priya and Raj's parents about Priya's relationship with Leonard. What if Priya and Leonard call Sheldon's bluff?

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Sheldon: Oh, good, you're up. I've written a new and improved roommate agreement that benefits me greatly. I'd like you to sign it.

Leonard: Why would I want to do that?

Sheldon: Excellent question. Do you remember what happened to the alien, played by talented character actor Frank Gorshin, in the Star Trek episode Let That Be Your Last Battlefield?

Leonard: Uh, Captain Kirk activated the self-destruct sequence and threatened to blow up the Enterprise and kill them both unless he gave in?

Sheldon: Affirmative. Computer, this is Dr. Sheldon Cooper. Activate self-destruct sequence. Code 1-1-A-2-B.

Female Voice: Self-destruct sequence activated.

Leonard: What are you gonna do, Sheldon, blow up the apartment?

Sheldon: That was my first thought, but all my cool stuff is here.

Priya: So what happens when it counts down?

Sheldon: Unless Leonard signs the new agreement in the next 41 seconds, this computer will send an e-mail to your parents in India saying that you're in a secret relationship with the whiter-than-marshmallow-fluff Leonard Hofstadter.

Priya: Do your worst Sheldon, I am not ashamed of my relationship with Leonard.

Leonard: Are you sure about this Priya.

Priya: Trust me, I am a lawyer, I know what I am doing.

Female Voice: 5, 4, 3, 2, 1, 0. An email has just been sent with the following text.

Dear Dr. and Mrs. Koothrappali.

My name is Dr. Sheldon Cooper, I am a friend and work colleague of your son Rajesh. You know that your daughter Priya is currently visiting with Rajesh. You may be interested to know that Priya is in a secret relationship with my friend, work colleague and room mate Dr. Leonard Hofstadter. The attached photograph shows the two of them together.

Best wishes from Pasadena.

Dr. Sheldon Cooper.

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10 minutes later Priya's phone rings, Raj is calling.

Raj: Hello Priya, could you come over to my apartment as soon as possible, our parents would like a word...