Summer Glau as Herself
The American actress born on July 24, 1981, named Summer Glau, made a guest appearance in The Big Bang Theory as herself in the episode “The Terminator Decoupling” from season 2. She is best known for her roles in science fiction and fantasy television series; as River Tam in Firefly, and its continuation film Serenity, as Tess Doerner in The 4400, as Cameron in Terminator: The Sarah Connor Chronicles, as Bennett Halverson in Dollhouse, as Skylar Adams in Alphas and as Isabel Rochev/Ravager in Arrow.
Summer Glau As Herself
Judy Greer as Dr. Elizabeth Plimpton
Judy Greer plays the role of Dr. Elizabeth Plimpton, an attractive cosmological physicist and sex enthusiast from Princeton University. She is under consideration for a position at the California Institute of Technology and comes to Pasadena as a friend and personal guest of Sheldon Cooper. Judy is best known for the character in Arrested Development as Kitty Sanchez, as well as Fatty Magoo from It’s Always Sunny In Philadelphia. She has also written a book in 2014 entitled “I Don’t Know What You Know From Me.”
Judy Greer As Dr. Elizabeth Plimpton