Control (The Devil Goblins from Neptune)

Control was a man that headed a division of the Central Intelligence Agency, an organisation which was a rival of sorts to United Nations Intelligence Taskforce. (PROSE: The Devil Goblins from Neptune)

He was forced to help the Fifth Doctor and UNIT in 1999. (PROSE: The King of Terror)

In 2001, Control had Fitz Kreiner and Dave Young surveilled, and ordered Dave captured when he began showing signs of an alien infection. He operated from inside the CIA's Belgian headquarters. (PROSE: Escape Velocity)

Also in 2001, Control authorised Alexander Hartford's mission to Siberia to investigate the evidence of time travel experiments in that region. (PROSE: Time Zero)

In 2010, Control was the boss of Agent Jennings, and had a reputation for putting agents into the field without consulting him. (PROSE: Apollo 23)

Appearance
Control had watery eyes, (PROSE: Time Zero) and dandruff. (PROSE: The King of Terror) He had a pale tongue and pale, bloodless lips. (PROSE: Time Zero)

Personality
Control expressed his frustration that UNIT were always the ones who ended up dealing with alien incursions, and wished for his team to have some kind of involvement. (PROSE: Escape Velocity)

Behind the Scenes
In the acknowledgements page of PROSE: Time Zero, Justin Richards notes that the copyright for Control belongs to Martin Day and Keith Topping.