Doctor Who is strangely concerned about Professor Horner's plan to cut open an ancient barrow near the peaceful English village of Devil's End; equally worried is Miss Hawthorne, the local witch, who foretells a terrible disaster if he goes ahead. Determined that the Professor should do just that is Mr. Magister, the new vicar (in truth the MASTER), whose secret ceremonies are designed to conjure up from out of the barrow a horribly powerful being from a far-off planet. The Brigadier and Jo Grant assist Doctor Who in this exciting confrontation with the forces of black magic!

Genre: Science Fiction