Strange things are happening in the Cape Cod sand dunes. There have been sightings of an unknown creature in the National Seashore, part African lion, part … something else?

Here is the classic Gothic mystery combining a lurking sense of danger in a strongly atmospheric setting, a Hound of the Baskervilles-style case involving the reawakening of an ancient family curse dating back to the whaling days of New Bedford, and a curse foretelling another death about to take place.

The first volume of the Captain Underhill radio mysteries, in which a detective duo on Cape Cod solves crimes.

It begins as static ... then, you hear a voice, desperate, frightened, coming from a shack in the Cape Cod dunes, broadcasting his story to anyone who might be listening. He tells an unbelievable tale of missing persons and an unseen enemy that may already have conquered us.

Is he insane? Is he deluded? And most terrifying of all, is he telling the truth?

About “The Final Case,” Doctor Scofield, Captain Underhill’s personal physician, comments, “A most interesting case study. It is both sad and ironic that the mental affliction Captain Underhill used to pretend to suffer from: that of being senile, was ultimately the very thing that laid him low. And yet, in the annals of crime solving, if this final case does nothing else, it proves the kind of natural-born sleuth my good friend, Waverly, was.”

Suspense thrillers from Cape Cod Radio Mystery Theatre.

Retired police captain Waverly Underhill and his sidekick, Doctor Scofield, uncoil the mystery in two chilling adventures. Heard on public radio, each is a contemporary tale in the classic tradition of The Shadow, with a full cast, original music, and sound effects.

Retired police captain Waverly Underhill and his sidekick, Doctor Scofield, uncover the truth in a story of greed and suspense. Heard on public radio, this is a contemporary tale in the classic tradition of The Shadow, with a full cast, original music, and sound effects.

Retired police captain Waverly Underhill and his sidekick, Doctor Scofield, unlock the enigma in two edge-of-your-seat thrillers. Heard on public radio, each is a contemporary tale in the classic tradition of The Shadow, with a full cast, original music, and sound effects.

The unforgettable villain from “The Caller on Line One” returns. A serial killer records his murders and sends the tapes to the police. A young detective takes charge and enlists the help of a beautiful FBI agent — with a great set of ears — whose specialty is analyzing audio recordings. But will that lead them to the killer before he strikes again?

An L.A. Theatre Works-commissioned adaptation of the classic Agatha Christie “whodunit”. Adapted from the novel by Kate McAll. In Christie’s clever and beautifully crafted tale, Detective Hercule Poirot receives an urgent letter from Paul Renauld summoning him to France. Upon their arrival, Poirot and his companion, Arthur Hastings, find they are too late. Plus, to complicate things further, certain facts just don’t add up.