Horatio Chinn was a Ministry of Defence official and head of an inquiry into UNIT. He was a nationalist, loathed by the Doctor for having "England for the English" (the Doctor's words) views; Chinn complained that the United Nations were "high handed" ever since UNIT started. (TV: The Claws of Axos) While he saw himself as a bureaucracy-busting troubleshooter, he was seen by the rest of the government as a buffoon and his only real skill was stroking the egos of insecure ministers and parliamentary private secretaries. As a result, he would bounce from department to department. (PROSE: Who Killed Kennedy) His reports were known for being garbled. (TV: The Claws of Axos)

While the Ministry had given him full security clearance, the Brigadier wouldn't tell him about the Doctor's origin and American UNIT agent Bill Filer shunned him as a security risk. Chinn was completely unaware who the Master was, no matter how many times he insisted. (TV: The Claws of Axos) What he didn't know was that the Defence Minister loathed him and only gave him the UNIT task to get him out of the way. As the Ministry was clashing with UNIT at the time, it was hoped that either Chinn or UNIT would be destroyed by the other or, at the least, cancel each other out. (PROSE: Who Killed Kennedy) The Minister would go as far as to imply to Chinn he was "our man on the spot, in more ways than one". (TV: The Claws of Axos)

Chinn was investigating UNIT when Axos came to Earth. (Before contact was made, he inserted himself into UNIT's tracking operation and tried to command it; all his orders were things UNIT were already doing or made the situation worse) He was very impressed by the Axonite, and saw all the possibilities for Great Britain if they got a monopoly of it. When the Brigadier tried to take control of the Axonite samples, Chinn called in the regular British Army to take over and arrest UNIT under the Emergency Powers Act - a move that was illegal. He went on to prevent a search for Bill Filer in case it interfered with the Axonite deal.

The UN made sure that he did not get his wish for Axonite as a solely British product (much to the annoyance of the Ministry, as Chinn hadn't stopped news leaking out). He was forced to organise its worldwide distribution.

He was stuck in the nuclear power plant during the Axos attack but managed to escape with the remaining UNIT survivors when it exploded. (TV: The Claws of Axos)

The Brigadier later tried to contact Chinn for help when government budget cuts threatened to shut down UNIT's UK branch. Chinn's assistant answered the call but Chinn refused to speak with the Brigadier. (PROSE: Where the Heart Is)

Behind the scenes Edit

  • It's not stated outright in the episode but Chinn is usually implied to be a civil servant. This is officially stated in both the novelisation (and Who Killed Kennedy following it), but in these he's part of the fictional "Ministry of Security" that wants to bring all the intelligence agencies together. Since UNIT's UN status complicates this, the Minister of Security has sent Chinn in to cause problems.
  • What became of Chinn afterwards is debatable. In the novelisation, Chinn took the credit for the defeat of Axos. However, in the novel Who Killed Kennedy, it is mentioned that he took the brunt of the Secretary's disappointment over the Axon debacle.
  • Chinn's first name was not given on-screen, only in the novels.
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