The Big Bang Theory Season 7 Episode 17
The Friendship Turbulence
Penny turns down a role in the sequel of her first movie. When Leonard questions the decision, they get into a fight. After Penny's car breaks down, she tries to take the role, but it's already cast. She decides to go back to the Cheesecake Factory. Leonard says he'll drive her, but instead gives you a car so she can continue auditioning for roles.
Bernadette is fed up with the insults flying between Sheldon and Howard. She ask why they can't be nice to each other. Sheldon explains that Howard started it 10 years ago by saying he looked like C-3P0 and Pee-Wee Herman. And, then when Howard played a prank on him.
To fix the situation, Howard ask Sheldon to go with him to Houston. They go and bond over their fear of turbulence.
Raj asks Amy to write a girl he's interested in online. Amy agrees, but the girl didn't like that Raj had someone else contact her. Instead, Amy and the girl bonded. When the girls meet for coffee, Raj shows up and scares her away.