Mayim Bialik in the Big Bang Theory 3x23, 4x01, 4x03

Mayim Bialik as Amy Farrah Fowler in "The Lunar Excitation" 3x23, "The Robotic Manipulation" 4x01, and "The Zazzy Substitution" 4x03 of the Big Bang Theory. Credit goes to charliewrites.tumblr.com