Magnum becomes the obsession and medium for a crazed killer who works though nursery rhymes.

An attempt is made on the lives of Robin's guests and Magnum is upset that one guest wants mainland investigator Jessica Fletcher to handle the case.

The crossover continues on Murder, She Wrote S03E08 Magnum on Ice (II).

The murder of Carol's mentor, Judge Kearns (Michael Constantine), raises suspicion that he may have been involved in taking payoffs.

Magnum reviews his mortality, his last case and his friends while trapped under an airplane wreckage on a remote mountain.

Magnums weekend with Cynthia, his supposed fiancée, is interrupted by an actress claiming a movie producer murders girls in his pornographic movies.