Doctor Who Project: Castrovalva

Well, I suppose I’ll get used to it in time.

Post-regeneration stories carry the extra burden of introducing the new Doctor, setting the stage for the adventures to come. But in casting Peter Davison as the Fifth Doctor, Doctor Who did not need to introduce the actor, as Davison was already an established and contemporary television star, with the tantalizing potential of drawing new viewers familiar with his other roles. Some of those parts were still ongoing at the time of his appointment, however, leading to the decision to push the start of Season Nineteen and Davison’s first story, “Castrovalva” (Story Production Code 5Z) out to January, 1982, a full ten months after the end of “Logopolis” (as opposed to the more typical seven to eight month hiatuses). Written by former script editor Christopher H. Bidmead, “Castrovalva” stands as a direct sequel to his “Logopolis” and relies on the audience remembering the details of that story, partly solved by recapping events in a rare pre-credits bumper scene demonstrating Tom Baker’s transformation into Peter Davison.

The Watcher melds with the Doctor

Not reprised, however, is the role of the Master in the Fourth Doctor’s demise, nor the excessive reliance on the “block transfer computations” at the heart of “Logopolis.” Producer John Nathan-Turner, aided here by script editor Eric Saward, doesn’t see that as a problem, though. The Master (Anthony Ainley) is as over-the-top a villain as ever seen in the series, his motivations reduced to rage-fueled vengeance and his bilious speeches capped off with peels of uproarious laughter. Pantomime scoundrels have greater nuance. As for the “block transfer computation” capable of manipulating space and time, and somewhat crucial to the entirety of this story, it’s presented as a given, a set of sums maths wizard Adric (Matthew Waterhouse) can do in his sleep. Nathan-Turner’s approach, one he developed in Season Eighteen with Bidmead, is to elide any concerns about the coherence or consistency of technobabble and other plot contrivances; if it serves the story, it serves its purpose, a refreshing (if not always satisfying) change from the tortured logic occasionally deployed to explain away how reversing the polarity will save the day. Here, it just works, leaving more time for storytelling. Or, in this case, running. Lots and lots of running.

Four to Out of Here

After escaping the guards at the Pharos Project, Tegan (Janet Fielding) and Nyssa (Sarah Sutton) drag the barely conscious Doctor into the TARDIS, but the Master captures Adric in the process. By means of block transfer computation, which is now shorthand for making things appear out of nothing, the Master forces Adric to project an image of himself into the TARDIS to send the Doctor, Tegan, and Nyssa on a one-way trip to the Big Bang. It’s telling that at first, Adric’s stilted manner can be easily written off as him being his default snotty self, such that no one notices him acting strangely.

Unravelling the Fourth Doctor's threads

He’s certainly not the only one who seems a bit off, as the Fifth Doctor’s regeneration does not proceed smoothly. The Master’s presence causes too much complication, preventing the necessary re-connections from taking place in the Doctor’s jumbled mind. Adric finds him literally (and, of course, metaphorically) unravelling the Fourth Doctor’s trademark scarf, which he uses to trace a long and winding course through the depths of the TARDIS; much of the first episode is spent watching people get lost in unmarked TARDIS hallways looking for the Zero Room, an isolation chamber that will calm the Doctor’s brain enough to allow him to finish regenerating.

Adric in the Master's Web

Frequent cutaways to the Master gloating about the Doctor’s impending doom, with Adric trussed up behind a skein of cables shouting his defiance, leave viewers quite certain as to the force causing the TARDIS to hurtle back through time and space, but it’s hard to take any of it seriously. Though Ainley turns in a bravura performance in “Castrovalva”—when he’s not playing the Master, as will be seen—the script does him, and the character, no favors; likewise Waterhouse, whose screeching as Adric diminishes any pathos his predicament might have deserved. Indeed, the story lacks so much tension that a leisurely detour into that now-mandatory regeneration feature, wardrobe selection, feels right at home. The Fifth Doctor, deep in the throes of a regeneration gone wrong, finds his new overcoat already laid out, by someone or something (the TARDIS itself, perhaps?). After some tentative toots on the Second Doctor’s recorder, he picks up a nearby cricket bat and finds it just right. A brief pop into a cricket-themed side room to change and he’s ready for a long innings…

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Doctor Who Project: Logopolis

Still, the future lies this way.

Season Eighteen of Doctor Who can be compared to renovating an inhabited house, as producer John Nathan-Turner, aided by script editor Christopher H. Bidmead, measures the windows, selects new carpeting, and pulls out the plumbing while the family already living there tries to get on with daily life. It is, charitably, an uneven season, with constant change from episode to episode, not all of it successful. But for the season finale—and Tom Baker’s final story—Bidmead delivers a striking tale, at once a meditative mood piece and a cracking bit of tense action: “Logopolis” (Story Production Code 5V) delivers on the promise of positive change in the series while providing Baker and the Fourth Doctor with a satisfying conclusion to over six years of adventures through time and space.

Adric (Matthew Waterhouse) and the Fourth Doctor (Tom Baker) in a decaying room deep in the TARDIS

The story starts in quotidian fashion, with the Doctor wanting to finally fix the wonky Chameleon Circuit on the TARDIS, allowing it to change shape into something other than a police box. He calls up the never-before-seen Chameleon Circuit panel, which pops out of the central console, to demonstrate what the TARDIS would look like as a pyramid. There’s a real sense of Bidmead wanting to add to the lore of the TARDIS, particularly with his introduction of the Cloister Bell, a staple plot device in years to come, which sounds its warning peals as the Doctor and Adric are talking in an old part of the ship overgrown with vines.

Janet Fielding as Tegan Jovanka and Dolore Whiteman as Aunt Vanessa

In order to repair the Chameleon Circuit, the Doctor first needs exactingly precise dimensions of the object the TARDIS is stuck externally representing, which necessitates a trip to Earth. Bidmead and director Peter Grimwade, a long-time Doctor Who crew member, go out on location to place a police box (or two) near a motorway leading to “London Airport,” a road along which Australian flight attendant Tegan Jovanka (Janet Fielding) and her Aunt Vanessa (Dolore Whiteman) are driving before a flat tire stops them. It’s no ordinary police box that Tegan enters looking for help, though, as another TARDIS has already materialized around the box that was there.

A Police Box in a Police Box, with Adric on top

Rather than jump right into action and excitement, Bidmead slowly unspools the tension, spending the majority of the first of four episodes ruminating on the nature of the TARDIS, of the complications of dimensionality and recursive loops. When the Doctor’s TARDIS arrives at the very same police box, it lands “around” the other TARDIS, which itself landed around the real police box. After several minutes spent watching the Doctor and Adric measuring the police box and discussing the “block transfer computations” needed to reprogram the Chameleon Circuit—a type of mathematics so advanced it can only be done by the living computers of Logopolis—they venture inside the police box and find another TARDIS with a police box inside it, and on and on, a paradox caused by one TARDIS being inside another. The Doctor fears they are trapped in an infinite regression, but finally they pop out back on the motorway, where three police officers have some questions about an abandoned car with two dolls in the front seat…

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