The death of a man on the remote Scottish island of Luig sparks a sinister discovery. Stars Peter Cushing and Vincent Price.

The curiosity of the inhabitants of the remote Scottish island of Luig is aroused when two strangers arrive for the funeral of the local doctor.

The two men are no strangers to each other, nor were they to the late Dr Hugh Dexter. One is Professor Curtis Lark - a flamboyant American explorer, scientist and Nobel Prize winner whose research has been in the field of telepathy and telekinesis; the other is John Cornelius - the eminent British brain surgeon.

What starts as a brief visit by two colleagues to honour an old friend quickly develops into a series of bizarre and frightening events uncovering the presence of forces unknown bent on world domination...

Starring Peter Cushing and Vincent Price.

John Cornelius ..... Peter Cushing

Professor Curtis Lark ..... Vincent Price

Minister Donald Schooler ..... Henry Stamper

Mrs Kyle ..... Shirley Dixon

Flora Kiery ..... Sandra Clarke

Mary ..... Irene Sutcliffe

Dr Hugh Dexter ..... Frazer Carr

Written by Rene Basilico from an idea by Robert Holmes.

Producer: John Dyas

First broadcast on BBC Radio 4 in 1977.