TV and film writer John Vlahos died in Westport, Conn. on April 8 of natural causes. He was 86.Born in Springfield, Ohio, he graduated from Carnegie Mellon U. and served as a Navy lieutenant in WWII. He wrote several Monogram Westerns starring “Crash” Corrigan before moving into television starting with the early “Philco Variety Hour.” Vlahos went on to write for 52 network television dramas over the next three decades. He wrote the pilot for series “The Nurses,” which ran for two years. Other credits include “Marcus Welby, M.D.,” “Route 66” and “Studio One.” He also wrote for Emmy-winning “The Defenders.” Vlahos is survived by his wife, Olivia; three children; and three grandchildren.