The Large Hadron Collision. My favorite episodes are the earliest ones, and watching Raj flop gleefully onto the bed at the end is priceless.

On a side note, it always looked to me like their hotel room was in an undersea aquarium. It's so blue out the window!

S06E16 "The Tangible Affection Proof. I love the way it end with Penny admitting her issues to Leonard, such a nice moment!

I like the Locomotive Manipulation, too, though. I mean, without it we would have never met train guy!

And Happy Valentine's Day to everybody on this board! ❤

I like Raj and Lucy's texting in the library date. With the added bonus of meeting Bert for the first time.

💎(That a big rock to represent Bert!)

S06 E18 - The Contractual Obligation Implimentation

Raj and Lucy did have some kind of awkward chemistry together.

Lucy was one of them that moved on to a good relationship, once they learned what a BAD one was like, thanks to Raj.