Boston professor and amateur detective, Michael Spraggue, together with his eccentric aunt investigates a suspicious physician in connection with the death of his acquaintance which endangers their lives.

Michael Nouri
as Michael Spraggue

Glynis Johns
as Aunt Mary

James Cromwell
as Lt. George Hurley

Mark Herrier
as Randy Hern

Patrick O'Neal
as Dr. Miles Richards

Andrea Marcovicci
as Samara Weller

Hank Garrett
as Knuckles

Callan White
as Hildegarde

Fritzi Jane Courtney
as Judge