From Wikipedia, the free encyclopedia. Mark Herrier (born October 6, 1954) is an American actor and film director, best known for his role as Billy in the 80s teen trilogy Porkys. He graduated from Lompoc High School in 1972. He has since made numerous appearances on shows such as M*A*S*H, Freddys Nightmares, Paradise, Murder, She Wrote, The Practice and Gideons Crossing. Description above from the Wikipedia article Mark Herrier, licensed under CC-BY-SA, full list of contributors on Wikipedia.