Sheldon and Raj test whether they could survive a dark-matter research expedition in a salt mine by simulating the conditions in a steam tunnel. Meanwhile, Leonard and Penny seek advice from Wolowitz and Bernadette after they fight about money.
Yes you saw it here first HQers. Check out this What Culture article about Sheldon and Amy. I don't agree with everything he posted (H/B and L/P having chemistry for example but I do think S/A have the least). This is the first time I have agreed with something about this relationship elsewhere on the internet. EVER! These two are far better as separate characters than together.
Synopsis:
Amy and Bernadette accuse Penny of being a “buzzkill” after she gets an email from work during their Vegas weekend. Meanwhile, the guys try to invent something cool, but only come up with new ways to procrastinate.