Professor Proton is as Obi-Wan with a light saber visits Sheldon.
Bernadette and Amy bring the Death Star Cake to the Star Wars Day celebration.
After having an emotional dream, Sheldon hugs Leonard to show he cares.
Sheldon, Howard and Raj start celebrating Star Wars Day on May 4th.
Penny talks to Sheldon before going to the funeral.
Leonard consoles Sheldon after letting him know a hero of his died.
The gang introduces Penny to Star Wars Day on May 4th.
Sheldon talks to Leonard wearing a robe in their kitchen.

TBBT Quotes

Raj: Well, to paraphrase Shakespeare: It's better to have loved and lost than to stay home every night and download increasingly shameful pornography.
Penny: Oh... you poor baby.
Raj: What's wrong with me, Penny?
Penny: Nothing, nothing. You know, if we weren't friends - and you hadn't brought up that creepy pornography story - I'd be on you like the speed of light squared on matter to make energy.
Raj: Hey, you totally got that right. E = MC squared.
Penny: I listen. I have no idea what it means, but I listen.

Sheldon: I recently read that during World War Two, Joseph Stalin had a research program to create supersoldiers by having women impregnated by gorillas.
Howard: What a sick use of science.
Raj: Hey, as long as the baby's healthy.
Amy: I wonder if Stalin considered any other animals.
Leonard: Hippos are the deadliest creature. A half-human, half-hippo soldier would be pretty badass.
Howard: Yes, but when they're hungry-hungry, you can stop them with marbles.
Sheldon: Yeah, the correct animal for interspecies supersolider is koala. You would wind up with an army so cute it couldn't be attacked.