Robin Masters' high school English teacher is staying at the estate while she writes a book about birds.
Robin Masters believes that his mentor is in town to interview a reclusive bird expert, but Magnum learns that she really has murder on her mind.
- Tom Selleck as Thomas Sullivan Magnum IV
- John Hillerman as Jonathan Quayle Higgins III
- Roger E. Mosley as Theodore "T.C." Calvin
- Larry Manetti as Rick Wright
- Sylvia Sidney as Elizabeth Barrett
- Joseph Wiseman as Dr. Albert Tessa
- Jacqueline Ray as Ms. Roebuck (credited as Jacquelyn Selleck)
- Fritz Feld as Lars
- David Kraul as Vladimir, in Budapest
- Mel Cabang as Taxi Driver
- Selleck's ex-wife Jacqueline Ray made her guest appearance.
- Joseph Wiseman (Dr. Albert Tessa) was Dr. Julius No in the famous 1962 James Bond movie Dr. No.
- Magnum: I promise, Higgins. No football games on the lawn, no gunfire before breakfast, no stewardesses unless they promise not to yodel, ok.
- Higgins: Magnum, I implore you. I beset you. Take that woman to Tessa at once before I go irrevocably, irretrievably mad!!
- (to the bartender)
- Rick: Gimmee some brew, Drew.
- T.C.: Ice tea, Lee. (laughs)
- Higgins: Are you telling me that the woman who has been driving me mad for a week is an imposter?
- Magnum: I'm afraid so, Higgins.
- Higgins: Well, if she isn't Elizabeth who is she?
Magnum: KGB? Hungarian Secret Police? I don't know, it doesn't matter. What does matter is she came here after Tessa and I led her straight to him.
- "Elizabeth Barrett": I hate you!
- Higgins: The feeling madam... is mutual.