Gerald Allan Sohl Sr. (December 2, 1913 - November 4, 2002) was an American scriptwriter for The Twilight Zone (as a ghostwriter for Charles Beaumont), Alfred Hitchcock Presents, The Outer Limits, Star Trek: The Original Series (once using the pseudonym "Nathan Butler"), and other shows. He also wrote novels, feature film scripts, and the nonfiction works Underhanded Chess and Underhanded Bridge in 1973.