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Professor Crawley is a bitter at the California Institute of Technology. He was portrayed by well known and Lewis Black, whose brand of consists of angry rants about , , , trends and .
Professor Crawley mentions that he has studied since he was eight old, earning him the school "Creepy Crawley". He has twenty years of experience and a . He is after his wife cheated on him with "a two-bit who lives on a and likes to wear boot-cut " while he was in the and discovered a new species of .
In "The Jiminy Conjecture", Caltech has cut off the for his , forcing him to move in with his in . In the same episode, Sheldon and Howard ask him to identify the species of a they caught in order to settle a .
- The name Crawley is a pun on the way insects get around by along the ground.