The Collaboration Fluctuation

"The Collaboration Fluctuation" is the nineteenth episode of the tenth season of the sitcom The Big Bang Theory. The episode aired on March 30, 2017.

Summary
Leonard, Penny and Raj adjust to their new living arrangement, and Sheldon takes an interest in Amy's work.

Extended Plot
Shamy plot: Sheldon and Amy begin to collaborate on a scientific project when Sheldon realizes something she's been working on could have implications with regard to a challenging issue in quantum mechanics. They try to work out some ground rules between them for this new kind of interaction and find that being snarky with one another helps their cognitive thought processes.

Other plot: Raj and Penny get along so well doing various "girly" activities together that Leonard feels left out. He spends some time with Howard and Bernadette before bringing it up to Raj and Penny.

Thanks to the report from RJ1013.

Credits

 * Guest starring:
 * Pamela Aldon as Halley (Voice Only)
 * Teleplay: Steven Molaro, Steve Holland & Dave Goetsch
 * Story: Chuck Lorre, Tara Hernandez & Giuseppe Graziano

Critics

 * Caroline Preece at Den of Geek! - Very little is most likely just enough for the majority of the show’s viewers, but there are others who’ll always demand more. That’s been the problem with Leonard and Penny this season - the writers have cycled through everything they had planned for the male and female lead, and there’s nothing left. They’re left with scraps while the better writing goes towards Sheldon and sometimes Howard. Which is why having Raj move into the main apartment was a great idea. It’s not going to set anybody’s world on fire, but it’s a fun change of dynamic that solves two of The Big Bang Theory’s major issues. It gives them an excuse to write a A-plot involving Penny and Leonard, and it puts Raj front and center. IMDb user reviews

Trivia

 * Raj and Penny start to bond over common interests.
 * Sheldon and Amy begin working on a science project together.
 * This episode was the closest to a moment where Leonard or Bernadette would be having a conversation in a nice sweet and, to some degree, helpful way with the other. The last episode where someone spoke nicely to the other was in the final scene of "The Deception Verification" (S7E2) where Bernadette tells Leonard in a sweet voice and smiling that Raj was able to talk in front of the girls without a beer right after Leonard left for his expedition to the North Sea.

Quotes
To be entered.