Magnum, P.I. - Season 4 Episode 20 Dream A Little Dream He's a Hellraiser in Paradise.
Overview: Thomas remembers his first client and his first case as a Private Investigator in 1979, when he was hired by a surfing champion who was being threatened, and was on the verge of entering into a serious relationship with her. The memories are brought on when now, in the present day, she calls for his help once again, to protect her and her young daughter after she again begins receiving threats. But events of present day seem destined to parallel the events of 1979...