The Big Bang Theory Season 9 Episode 21
The Viewing Party Combustion
All of the guys are debating about comic books when Raj gets a message from Claire, and tells the group he's actually seeing both Claire and Emily.
Later, Leonard has a giant party sub for their viewing of Game of Thrones, and Sheldon brings up the fact that they have a roommate meeting the following day. Leonard says he's not going, but Penny sees no problem with it.
Raj continues to brag about dating two girls, while pretending to complain about it, and Howard finally calls him out on it.
Amy then admits she never enjoyed their relationship agreement meetings, and Sheldon is surprised. Everyone gets mad at each other, the group splits up to have separate viewing parties.
Amy also tells Leonard that the main reason she took his side was because of how close Penny and Sheldon are. She points out how much Penny helps him, and also that Penny has him alter the roommate agreement to her advantage.
Stuart shows up dressed for the occasion, embarrassed because no one else is on costume.
Howard has an allergic reaction, and they realize the sub had mortadella, which contains pistachios, and they have to take him to the hospital.