Finding the fourth segment of the Key to Time was simple enough, but holding onto it may be another matter. The Doctor and Romana find themselves embroiled in the political games of the planet Tara, where doubles, android or otherwise, complicate the coronation of Prince Reynart.
Tom Baker
The Doctor
Mary Tamm
Romana
John Leeson
K-9 (Voice)
Peter Jeffrey
Count Grendel
Simon Lack
Zadek
Neville Jason
Prince Reynart
Paul Lavers
Farrah
Lois Baxter
Lamia
