Doctor Who (1963): The Doctor, aged by the unstable tachyon machine, finally uncovers the truth about the tachyon generator. And he makes an unexpected ally�

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