Castrovalva (TV story)

Synopsis
The Doctor's latest regeneration has proven more unstable then his previous ones. Adric has been captured by the Master, who is taking advantage of the Doctor's weakened state to ensnare him in an elaborate trap whose  recursive nature threatens to destroy his mind.

Plot
Detailed sypnosis

Cast
The Doctor - Peter Davison

The Doctor - Tom Baker

Adric - Matthew Waterhouse

Nyssa - Sarah Sutton

Tegan - Janet Fielding

The Master - Anthony Ainley

Shardovan - Derek Waring

Mergrave - Michael Sheard

Ruther - Frank Wylie

Portreeve - Neil Toynay (pseudonym for Anthony Ainley)

Head of Security - Dallas Cavell

Child - Souska John

Security Guard - Harry Fielder

Crew
to be added

Story Notes

 * This is the first Fifth Doctor story aired, although it was not Peter Davison's first work on the series; he had a brief appearance in "Logopolis"


 * The story "Four to Doomsday" was actually filmed before "Castrovalva".


 * Tom Baker appears in the opening sequence, a replay of the regeneration scene which ended "Logopolis," but he is not listed in the credits.


 * The Portreeve is listed in the credits as being played by "Neil Toynay", an anagram of "Tony Ainley". This was a play on the Master's habit of using either anagrams or synonyms for "Master" as aliases.


 * The shot used in this story of the town of Castrovalva sitting on a cliffside was inspired by a print by M.C. Escher.


 * The Fifth Doctor first dons his cricket uniform and his habit of pinning a stalk of celery to his lapel in this story.

Ratings
to be added

Myths
to be added

Location Filming
to be added

Discontinuity, Plot Holes, Errors
to be added

Continuity
The Keeper of Traken, Logopolis

DVD and Video Releases
to be added

Target Novelisations
to be added