Beneath the Salt Plains of Utah, the billionaire collector Henry Van Statten holds the last relic of an alien race.
The TARDIS materialises in a dark warehouse in 2012, many storeys below the surface of Utah near Salt Lake
City, in what appears to be a museum of alien artifacts... including a Cybermen head and a Slitheen arm. The Doctor (Christopher
Eccleston) touches one of the cases which sets off the alarm, and soon he and Rose (Billie Piper) are surrounded by guards
who take them prisoner.
The facility they are in is owned by Geocomtex, a technology company owned by the wealthy and
powerful Henry van Statten (Corey Johnson), who arrives in a helicopter at the complex and meets its manager, Diana Goddard
(Anna Louise Plowman) and a brainy science genius who examines the alien technology, Adam (Bruno Langley). The Doctor and
Rose meet van Statten, who remains unimpressed with the Doctor's seemingly endless knowledge of alien technology. But van
Statten realises the Doctor may have some use to him, as he puts him into a cell with Geocomtex's one live alien specimen...
what he calls a "metaltron," but what the Doctor soon realises is a Dalek. A Dalek that should not exist.
informs the Dalek of recent history, where at the end of a massive Time war, the Daleks and the Time Lords fought and destroyed
each other; both he and the Dalek are the last of their kind. The idea infuriates the Doctor and changes the Dalek's perception,
but the Doctor soon attempts to electrocute the Dalek. Van Statten stops him, and strings him up to interrogate him, scanning
the Doctor and recognizing he's an alien. Rose, meanwhile, gets to know Adam, who does much of the research at the base and
years to go to the stars, but soon persuades him to let her see the captive Dalek. Rose meets it, and feels pity for it...
but when she touches the Dalek, it samples her DNA, allowing it to recharge itself and escape. Suddenly, the Dalek is loose
and the base is under full alert; it kills the security officer, Bywater (John Schwab) and his entire squadron, and heads
toward the main complex.
Adam and Rose flee into the stairwell, while the Dalek kills a soldier, De Maggio (Jana Carpenter),
who tries to stop it. Up on the surface, van Statten, Goddard and the Doctor attempt to find safe passage out of the underground
for Adam and Rose. The two meet up with another security contingent, but the Dalek outwits its commander and the team when
it activates the fire safety sprinklers and then electrocutes everyone through the water. Adam and Rose flee upward as the
Dalek levitates to follow them; Adam makes it to safety, but before Rose is able to get through the bulkhead, the Doctor is
forced to close it. The Dalek takes her prisoner, but for some reason doesn't kill her.
The Dalek tries to use Rose
as leverage; it almost attacks van Statten and Diana but then stops, and takes Rose to the top floor, where it appears it
will attempt to escape. However, the Dalek is transfixed by the sunlight shining on it through the roof; Rose's DNA has not
only reactivated it, but begun to change it completely. The Doctor arrives with a weapon Adam helped him find, but Rose pleads
for the Dalek, who has opened its casing and allowed the light to penetrate the mutated creature inside. The Doctor tries
to stop his own instincts, but the Dalek pleads with Rose for one last order - to kill itself. Rose gives in, and the Dalek
As van Statten prepares to leave, Goddard ambushes him, having him escorted away to have his brain
wiped clean of memories in punishment for all the death he's caused; she'll have the entire base filled with concrete and
destroyed. The Doctor and Rose return to the museum to reenter the TARDIS, but Rose has dragged Adam along, asking the Doctor
if he can travel with them to see the stars he's always imagined. The Doctor protests, but Adam enters the TARDIS before it
departs for another adventure, now with a party of three aboard...