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Serial: 5A Episode Nos. 480, 481, 482, and 483. Title: The Ribos Operation
The White Guardian sends the Doctor and his new assistant Romana on a quest to find and assemble the six disguised segments of Key to Time. The first segment is located somewhere on the planet Ribos, where the Doctor runs afoul of a con scheme to "sell" the entire planet to the deposed tyrant, the Graff Vynda-K. Will the Doctor escape the deadly catacombs with the vital segment, or is he one of those who has been prophesized as doomed to die?
This story sees the debut of Mary Tamm as Romana and Cyril Luckham as the
White Guardian. It marks the beginning of
the Doctor's six-story quest for the Key to Time.
starring Tom Baker as Doctor Who, Mary Tamm as Romana, Cyril Luckham as the White Guardian, and John Leeson as the Voice of K9. Written by Robert Holmes, Produced by Graham Williams, and Directed by George Spenton-Foster.
Originally
transmitted from
DVD Features:
- Graphical menus, episode selection features, and scene selection features.
- Production notes subtitles.
- Photo galleries.
- Original 4:3 aspect ratio.
- Who’s Who actors’ biographies.
- Commentary track by actors Tom Baker (Doctor Who) and Mary Tamm (Romana).
- When you first start playing The Ribos Operation, a caption slide pops up and provides a little background on the behind-the-scenes goings-on before
the season commenced.

