The Big Bang TheorySeries 6 Episode 5: The Holographic Excitation
The gang celebrates Halloween with a fancy dress party at Stuart's comic book shop, but Sheldon and Amy can't agree about which costumes to wear. Leonard and Penny get a new spark in their relationship when she visits him at his laboratory. Howard just can't stop talking about his trip to space, much to the irritation of his friends, and it takes a word from astronaut Buzz Aldrin to get his feet back on the ground.
- Holiday / Sitcom
- Original air date