Ben Taggart

 was a human born on Agora sometime after the beginning of the CyberNomad occupation of the planet in the 2150s. He was the father of Grant Markham.

Ben fought as one of the rebels under Arthur Lakesmith in 2176, in an attempt to overthrow the Cybermen's rule. However, when faced with the prospect of his self-sacrifice to the rebellion having the potential to be futile, he surrendered to the Cybermen, ultimately leading the rebellion to fail. For the next fifteen years, Ben served as an Overseer, betraying the people and the cause that he once fought for, although he assisted the remaining rebels in preparing for a second rebellion.

Eventually, Ben Taggart's status as a spy for the rebels was discovered by Vincent Madrox, the Chief Overseer whom Ben served under, and the Cybermen, in 2191. As punishment, Ben was sent to the conversion chamber of the Cybermen's scout ship to be cyber-converted. However, he was spared from full conversion when the Sixth Doctor activated the cryogenic suspension systems of the conversion units before the five-hundred humans inside could be fully converted. Despite this, Ben was unable to survive the process of being cryogenically frozen, and died, after saying goodbye to his son, Grant.

Biography
Ben Taggart was born on Agora in the 2150s, early into the CyberNomads' enslavement of the planet as a Cyberman breeding colony.

The 2176 rebellion
In 2176, Ben fought, alongside several other humans, in a rebellion led by Arthur Lakesmith, against the Cybermen, when they returned to Agora to convert another quota of five-hundred humans. During the battle, Ben and the rest of the surviving rebels were herded out of Population Control by the Cybermen. Believing that the fighting had passed him, Ben was then nearly killed by a Cyberman, before Arthur Lakesmith shot the Cyberman and forced Ben to accompany him back into Population Control, intending to detonate a makeshift bomb in the complex's control centre that would destroy Population Control and potentially the Cyber-ship. However, the duo were attacked by more Cybermen inside the complex, who brutally maimed Arthur, forcing Ben to take the bomb and destroy the complex himself. When Ben was trapped by two Cybermen in an Overseers' rest area, however, he succumbed to his fear that his self-sacrifice would fail to help the rebels win their battle against the Cybermen, and eventually surrendered to them. (PROSE: Killing Ground)