Gerald Flood was born in Portsmouth, son of a Naval family. He was a wireless operator during the War and worked as a filing clerk after the War ended until he landed a job with the Farnham Repertory Company.

It was there that he met his future wife, Anne. He toured in rep, and appeared in productions including "Hamlet," "Power and Glory" and "Charley's Aunt." In 1960 he performed in "The Complaisant Lover" at the Globe Theatre and went on to appear in "The Formation Dancers," "Children's Day" and "There's A Girl In My Soup.