Doctor Who (1963): Deaths unaccountable, hidden mines and ground that is hungry � the mystery of Frontios deepens. Beneath the Earth awaits something out of Turlough's past�

Starring:

Elisabeth Sladen, Frazer Hines, Jacqueline Hill, John Levene, John Scott Martin, Jon Pertwee, Katy Manning, Nicholas Courtney, Pat Gorman, Patrick Troughton, Peter Davison, Tom Baker, William Hartnell, William Russell

Genre:

Adventure, Drama, Sci-Fi