Marta Kober (Friday the 13th: Part II) stars alongside Clu Gulager in episode 123 (Season 6) of Magnum P.I. in an episode called The Way of the Stalking Horse that aired in 1986.
Here's a little write-up about Kober on Magnum-Mania.com
Marta Kober ("Mary Elizabeth") was in Friday the 13th Part II (she was part of the famous after-sex impalement scene) and Playboy's "Inside Out #1". Martha is also remembered for her performance in the educational after-school movie Rodeo Red and the Runaway (1978). She received an Emmy nomination and a Christopher Award for her starring role in that movie. Her performance in this episode as the street kid "Mary Elizabeth" is highly memorable.