Harvey is a neural clone of Scorpius and exists solely in the head of John Crichton. He was also played by Wayne Pygram. Harvey is the result of a neural chip that was placed into Crichton's brain by Scorpius after the Aurora Chair failed to reveal the wormhole information he was after. His name, given to him by Crichton, is taken from either the Mary Chase play "Harvey", in which Harvey is an invisible six-foot, one-and-a-half-inch tall rabbit that only Elwood P. Dowd can see, or the popular film versions, both starring Jimmy Stewart (1950; 1972). Harvey first appeared in "Crackers Don't Matter" and had his last appearance in "".