Tranter

Tranter was a Space Security Service officer who was in command of Station 7.

Biography
In his youth, Tranter fought the Daleks, and developed such a hatred for them that over time adopted the slogan "The only good Dalek is a dead Dalek." While first assigned to Station 7 as a Junior officer, Tranter spoke out against Professor Weston's proposal to genetically modify Daleks into pacifists. He was reassigned to the front lines for his hot-headedness, but there he earned himself a reputation and numerous military awards. After one battle he was reported lost, but was in fact captured by the Daleks. The Daleks realised Tranter's importance and tortured him for information on Station 7. They also implanted him with false memories of his time in imprisonment and escape, a behaviour pattern, and an ocular implant. This allowed the Daleks to use Tranter as an agent, secretly controlling his thoughts, accessing his sight through the ocular implant, and being able to find his location through a transmitter. After he was released and found by his comrades, Tranter was removed from the front line and offered any desk job he wanted; unknowingly affected by the Daleks, he chose to command Station 7. Weston jettisoned his laboratory onto the planet below, fearing that Tranter would have come back specifically to stop his research.

Some time later, the Doctor and Amy Pond came to Station 7 and were brought to Commander Tranter by Jay. Believing them to be inspectors (as suggested by their psychic paper), he explained to them the research which was carried out in the Station. One such project, headed by Kustler, involved the conversion of Daleks for the control of humans by remote control, which he objected to along with the Doctor. Soon after the Station was found by the Daleks and attacked, and, left with no other option, Tranter ordered the conversion and re-armament of more Daleks to use against the attackers. The converted Daleks however turned on them and they were forced to flee (as Weston had before), leaving Station 7 to be destroyed by the Daleks.

On the planet below, Tranter and the Doctor found Weston and the culmination of his research: a pacified Dalek. However they learned from Weston that Jay and Amy were tracking them down with a 'converted' Dalek, and that other Daleks were not far away. Once Amy and Jay arrived, the Dalek was stopped from exterminating the pacified Dalek, and the mutant trapped in a container. Its casing prepared for the pacified Dalek to help them escape, while a countdown was set for the laboratory's reactor to explode. As they made their way to safety, their way was blocked, and Tranter volunteered to go with Jay to the laboratory to open hatches for a different route. Once there, Jay realised Tranter purposely put the unmodified Dalek back in its casing, and he attacked her. The Doctor intervened and revealed him to be a Dalek agent, after which he cut off the Daleks' control. Tranter, himself once more, offered to deactivate the reactor's safety mechanism for their plan to work. He managed to do so while the pacified Dalek re-activated the countdown, leaving neither time to escape. Tranter's sacrifice allowed the Daleks to be defeated and the others to escape, earning his redemption. (GN: The Only Good Dalek)