Watch The Big Bang Theory Season 3 Episode 21 online via TV Fanatic with over 5 options to watch the The Big Bang Theory S3E21 full episode. Affiliates with free and paid streaming include Amazon, iTunes, Vudu, YouTube Purchase, and Google Play.

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Episode Details

Sheldon has a female physicist, Dr. Plimpton (Judy Greer) spend the night at the apartment.

Rating: 4.1 / 5.0 (20 Votes)
Episode Number:

The Big Bang Theory Season 3 Episode 21 Quotes

Dr. Plimpton: What if there's a disaster that destroys all of the USB ports?
Sheldon: Then there's really no reason to live, is there?

I have a lady friend who will be staying with me for a few days. I want her to feel at home; I also bought scented soaps, pantyhose, Midol, calcium chews, and what is apparently a yogurt specifically designed to regulate the female bowel.