He is mostly known for playing lead roles in several B-movies and action films such as Ilsa, Harem Keeper of the Oil Sheiks, Planet of Dinosaurs and No Retreat, No Surrender 2.
In 1976, he played the lead male role, opposite Dyanne Thorne in Ilsa, Harem Keeper of the Oil Sheiks.
During the 1980s, after a short hiatus from acting due to an accident, Thayer found himself working in the Philippines, where he starred in several low-budget action films such as Deadringer, No Dead Heroes and Phantom soldiers.
In 1987, he played one of the lead roles in the action film No Retreat, No Surrender 2, opposite Loren Avedon and Cynthia Rothrock.
This article about a United States film actor born in the 1940s is a stub.