Maxil

Zealous and humourless, Maxil was a Time Lord commander of Gallifreyan Chancellery Guard and Castellan of the High Council.

Biography
Like all Time Lords, Maxil was taken from his family at the age of eight for the selection process in the Drylands. Staring into the Untempered Schism as part of a Time Lord initiation rite, Maxil was inspired by what he saw in the Schism. (PROSE: A Brief History of Time Lords)

Maxil became Commander of the Chancellery Guard. During this time, he stunned the Fifth Doctor with a staser blast and confined him in a cell under the Capitol to await the judgement of President and the High Council. He also planted a listening device in the Doctor's TARDIS on the orders of Castellan Jerricho. (TV: Arc of Infinity)

Promoted to Castellan, Maxil regularly trained Castellan Wynter. (AUDIO: Lies) Inquisitor Prime Darkel contacted him to escort her into the Vaults so that she could speak with her advisor (AUDIO: Imperiatrix) and, during the Gallifreyan Civil War, he sided with Pandora over Romana. Afterwards, he was demoted to Commander. (AUDIO: Appropriation)

Behind the scenes

 * Maxil was portrayed by Colin Baker, who later became the Sixth Doctor. Maxil was also to have appeared in The Five Doctors, but was dropped due to Baker being unavailable. A myth later arose that this was as a result of Baker being chosen to succeed Peter Davison as the Doctor; however, in fact, Baker wasn't offered the role of the Sixth Doctor until June 1983, months after The Five Doctors was filmed.
 * Maxil shoots the Fifth Doctor at one point during Arc of Infinity — namely in the closing moments of part one. As a result, Baker has often joked that he gained the role of the Doctor by shooting the previous incumbent.
 * Colin Baker has said he made the suggestion that, in The Mysterious Planet, Commander Maxil should have arrested the Doctor and taken him into the courtroom on Space Station Zenobia.
 * This was the first time that a future actor to play a Doctor was involved in an earlier production on screen. Baker would be succeeded in this regard by Peter Capaldi. Prior to being cast as the Twelfth Doctor in 2013, Capaldi played both Lobus Caecilius in The Fires of Pompeii in 2008 and John Frobisher in Torchwood: Children of Earth in 2009. Furthermore, David Tennant participated in several Doctor Who audio dramas for Big Finish Productions (the first being Colditz) and had a minor voice role in Scream of the Shalka before being cast as the Tenth Doctor. David Bradley, who stood in for William Hartnell as the First Doctor in The Doctor Falls, Twice Upon a Time and The Power of the Doctor, previously played Solomon in Dinosaurs on a Spaceship and voiced Azure of the Claw Shansheeth in Death of the Doctor.