On Earth, a seashell-like organic mass appears in London, burrows its roots into the city’s power grid, and slowly begins growing in size as it feeds. UNIT has been called in to deal with it, though UNIT’s scientific advisor, Dr. Elizabeth Klein, is unable to discover much about it.
The Doctor’s TARDIS follows a telepathic trail into an alternate dimension, landing on the world of the Tolians. They, too, are dealing with a seashell-like organic mass draining their power, though this one has taken things to a more advanced stage: having brought Tolian civilization to its knees, it now drains the life force from the Tolians themselves for lack of a more potent power source. The Doctor recongizes it as an interdimensional node, but when another TARDIS materializes and a younger, more brash incarnation of the Doctor strides out, the “new” Doctor warns the seventh Doctor not to help the Tolians. The Doctor ignores the future Doctor’s warning and tries to help, only to find himself ensnared in a trap: the Tolians force the Doctor to use the interdimensional node to drain energy from other dimensions.
The Doctor and Raine escape with their lives, emerging through a dimensional gateway to Earth, where they discover that the future Doctor has been helping Klein and UNIT battle a series of alien incursions in rapid succession. Klein is less than thrilled when the “Umbrella Man” returns to her life, and UNIT’s Major Wyland is concerned that the two Doctors don’t appear to be getting along very well – the “new” Doctor seems concerned only with getting back to his TARDIS as soon as possible, and seems to have an unusual rapport with nearly every interdimensional invader to appear. The Doctor discovers, far too late, that the man claiming to be his future self is acting only in his own interests, and has already taken steps to turn Klein against him… and every living thing on Earth may pay the price.
written by Nicholas Briggs and Jason Arnopp
directed by Nicholas Briggs
music by Martin Johnson
Cast: Sylvester McCoy (The Doctor), Tracey Childs (Dr. Elizabeth Klein), Beth Chalmers (Raine Creevy) Alex Macqueen (The Other Doctor), Julian Dutton (Colonel Lafayette), Bradley Gardner (Sergeant Pete Wilson), Miranda Keeling (Sylvie/Liz Morrison), Ben Porter (Private Phillips/John Starr), Sam Clemens (Major Wyland-Jones), Alex Mallinson (Private Maynard/Arunzell), Sophie Aldred (Ace)
Notes: Alex McQueen played Julius in the British political comedy The Thick Of It; fellow cast member Peter Capaldi was cast as the Doctor just a few months after the release of UNIT Dominion.
Timeline: after Animal and before the 1996 TV Movie
LogBook entry and TheatEar review by Earl Green