The Big Bang Theory (Season 8)

时长:00:20:31 / 首播:2015-01-29
Sheldon has a problem in his dark matter Proton decay research. After Penny says doing a fitness routine she hates motivates her, Sheldon seeks to do the same with his anxiety level while he works. The guys enjoy irritating Sheldon when he asks them to do so, while he annoys the women when he tries to listen to their mindless girl talk. Sheldon becomes exhausted and hallucinates among other things. A frustrated Amy throws him out of her apartment when he focuses on his research and anxiety during their date night. On the bus home he hallucinates a man is really a mix of an Armadillo and Isaac Newton. Leonard and Penny are able to get an exhausted Sheldon to sleep after singing Soft Kitty to him. Sheldon is able to continue his research afterwards.

Meanwhile, Howard has invented a game 'Emily or Cinnamon' where the rest of the friends try and guess whether an embarrassing quote from Raj was said to his girlfriend or his dog. Raj is annoyed, but Emily is okay with it, thinking it is sexy that Raj is sensitive. She kisses Raj and is turned off by the dog hair in his mouth.

Recurring characters: Laura Spencer as Emily Sweeney, Ed Lieberman as Man

Title reference: Sheldon seeking the perfect anxiety level to motivate a breakthrough in his research.