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Episode Summary

Southern England, 1981. The universe has been saved, but at the cost of the fourth Doctor's life. The newly-regenerated fifth Doctor must rely on his friends to survive as the regeneration threatens to fail…
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    Trivia, Notes, Quotes and Allusions

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    • Trivia

      ADD TRIVIA
      • Factual Error: Nyssa, a scientist, claims they are travelling to "the creation of the Galaxy out of a huge inrush of hydrogen". She means the Universe, not the Galaxy. Edit
      • Revealing Mistake: When the Doctor levitates in the Zero Room, his collar question marks are reversed and his hair is parted on the wrong side. Edit
      • There are a number of minor continuity errors between this episode and Logopolis: the guards are different, the TARDIS has landed in a different field, Tegan's handbag appears on the TARDIS console, the weather changes, etc. Edit
    • Notes

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      • Novelisation: Doctor Who - Castrovalva by Christopher H. Bidmead (ISBN 0 426 19326 1) first published by W H Allen in 1983. Edit
      • DVD: Doctor Who: Castrovalva released (along with The Keeper Of Traken and Logopolis) as part of the Doctor Who: New Beginnings box set (BBCDVD 1331) on 29 January 2007. Released in U.S.A./Canada on June 5 2007. Video: Doctor Who: Castrovalva (BBCV 4737) released in March 1992. Released in U.S.A./Canada (Warner Home Video E1144) in October 1993. Edit
      • The working title for this serial was The Visitor. This episode was also a replacement for a story entitled Project Zeta-Sigma, written by John Flanagan and Andrew McCulloch and which was later abandoned. Edit
    • Quotes

      ADD QUOTES
      • Tegan [ regarding the data bank ]: Will it tell us how to fly the TARDIS? Nyssa: I'm sure that's in there, somewhere. Once we find the index file. Tegan: How do we find the index file? 'Course, if we had an index file, we could look it up in the index file, under "index file"! Edit
      • The Doctor: Have you ever been to Alzarius? Adric: I was born there. The Doctor: Really? It's a small universe, isn't it? Edit
      • The Doctor: I'm the Doctor. Or will be, if this regeneration works out… Edit
    • Allusions

      ADD ALLUSIONS
      • While wandering in a daze after regeneration, the Doctor refers to a number of past experiences. He mentions past companions Romana, The Brigadier, Jamie and Vicki, as well as past locales he visited: Alzarias (Full Circle)and Logopolis. He also mentions his old enemies the Ice Warriors. In addition, before trying on his new outfit, The Doctor finds a recorder and tries out a few notes. Playing the recorder was a hobby of the second Doctor. Edit
      • Castrovalva The title of this story comes from a print by reknowned Dutch artist M.C. Escher who was much celebrated for his use of impossible perspectives and optical illusions. The full significance of this allusion becomes clear in episodes three and four when the collapsing world of Castorvalva takes on a distorted appearance reminiscent of Escher's work. Edit
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