Harold "Hal" P. Warren (October 23 1923 - December 26 1985) was a fertilizer salesman who lived in the El Paso, Texas area. He is best remembered for writing, directing, producing, and starring in the 1966 movie Manos: The Hands of Fate. Warren continued on as a fertilizer salesman for some time after making Manos. He tried pitching a sequel to Manos and another script named Wild Desert Bikers, but failed. Warren then tried turning the script of Wild Desert Bikers into a book, "Satan Rides a Bike", but could not find a publisher willing to publish his work. Hal Warren died in December 1985. His widow moved to Colorado.