is a Jewish physicist
, who objects to Sheldon
's plans to solve the Middle-East Crisis
by building an exact replica
in the middle of the Mexican Sonoran Desert
in order to make a new promised land
. He is seen discussing the matter with him at Dennis Kim
's welcoming party
, wearing a yarmulke
. ("The Jerusalem Duality
In "The Hamburger Postulate", Sheldon mentions to Leonard that he and Leslie could manufacture a Mr. & Mrs. Goldfarb, perhaps inspired by Professor Goldfarb.
Mentioned in "The Helium Insufficiency", when he used his grant money for a Russian girlfriend who lived in Van Nuys instead of using it to buy the electron microscope he was supposed to.