Marlyn Mason (born August 7, 1940 in San Fernando, California) is an American actress, producer, and screenwriter. Mason played the role of Nikki Bell in the television series Longstreet (1971-1972), which starred James Franciscus. Her other acting credits include roles in ' ' Hogan's Heroes' ' My Three Sons, Burke's Law, The Invaders, Kentucky Jones, Bonanza, Ben Casey, Dr. Kildare (in a recurring role), Laredo, Occasional Wife, The Big Valley, The Man from U. N. C. L. E., I Spy, Laredo, Hogan's Heroes, The F. B. I., Mission Impossible, The Fugitive, Mannix, The Invaders, The Odd Couple, Love, American Style, Marcus Welby, M. D., Cannon (TV series), Barnaby Jones, Gomer Pyle, U. S. M. C., Boone, The Bronx Zoo, Charles in Charge, Ironside, and Jake and the Fatman, and in the episode "The Mask of Adonis" from the 1977 series Quinn Martin's Tales of the Unexpected (known in the United Kingdom as Twist in the Tale). She guest-starred on the final Perry Mason episode, "The Case of the Final Fadeout," portraying Erna Landry, a 'nice-girl' actress of a television show. She played Sgt. Margo Demarest in Twelve O'Clock High Season 3, Episode 9 "The Fighter Pilot" Mason played a principal role in the original 1967-68 Broadway production of How Now, Dow Jones. Mason also appeared in the films Because They're Young (her film debut, in an uncredited role), The Trouble with Girls, Making It and Christina, and the television movies Brigadoon, Carousel, A Storm in Summer, Escape, That Certain Summer, Outrage, Attack on Terror: The FBI vs. the Ku Klux Klan, Last of the Good Guys, The New Adventures of Heidi, and My Wicked, Wicked Ways: The Legend of Errol Flynn.