Played by: W.T. Zacha
First Appearence: Don't Mess Around With Jim
Greg Marshall was arrested by Bill for second degree murder. He was at some point paroled and meet up with Bill and Ralph at the Desert Air Hotel. He threaten Bill and later made good on his threat when he and several other criminals abducted Bill. They took him out to the desert in order to kill him. Ralph flew after them and fought them off, saving Bill.