Recap / Big Finish Doctor Who SR The Four Doctors
The Fifth Doctor
is investigating a time leak at a lab. He's interrupted by the cyborg lead scientist's cyborg brother, Colonel Ulrik, who barges in with an army of Daleks. They're after something very dangerous inside the main vault.The Eighth Doctor
's TARDIS lands him in the same lab, and after a moment of confusion, he remembers visiting the lab about a millenium before (when he was all blond and crickety and "terribly polite") and almost being killed by Daleks. Since he also remembers a conversation he had with an anonymous Time Lord, he deduces that he'll now have to go pretend to be said anonymous Time Lord so as not to screw up the timeline (after all, if he'd revealed his identity at that point, he wouldn't
have remembered it). Through a beaten-up intercom and some fumbling to obscure his voice, he manages to convey to Five that they need to activate a time loop between their TARDISes.The Seventh Doctor
is visiting a friend in 1854, Professor Michael Faraday
, who has recently come into the possession of a Special Weapons Dalek. Ulrik also ends up in Faraday's laboratory and, after being extremely confused for a while, starts to go for the Dalek. The Seventh Doctor remembers having faced Ulrik twice before and manages to send him, and the Special Weapons Dalek, back in time to the war Ulrik's grandfather fought and died in.
Ulrik's training never prepared him for historical war, and terrified, he hides in the manor that he knows was also the place where his grandfather was killed in this war. He's quickly captured and tortured for months by Daleks, who don't recognise his cyborg design, since it hasn't been invented yet. They also don't recognise the Special Weapons Dalek, although it insists that the others have to obey. The Sixth Doctor
, who knew Ulrik would appear here from remembering doing the adventure as the Fifth, gets Ulrik out of his cell. It's discovered that the cyborg race reverse-engineered their technology from the Special Weapons Dalek... and built their own Dalek-shaped tanks, modifying their own bodies to work together with regular parts of Dalek shells and exert control over them. The future Daleks took out this part of the design as a reaction. The cyborgs also captured Ulrik's grandfather, whom Ulrik believed died a cowardly death in the war. Instead, as it turns out, they fused Ulrik's grandfather with the Special Weapons Dalek, who will one day end up in the the cyborgs' laboratory vault.
The four Doctors and Ulrik eventually end up back at said vault — meeting the younger Ulrik — and release Ulrik's grandfather, who is almost
able to save the day by accepting Ulrik's orders. But the older Ulrik dies, and the younger, who is extremely bewildered, gets sucked into the time loop together with the Special Weapons Dalek, to end up in 1854.
The Doctors banter for a bit, realise that only Eight will remember this part, and get sent back to their own timelines.