The Master (The Creation of Camelot)

A version of the Master once posed as Merlin in Camelot, but his plans to throw England's history off the rails were foiled by the Fifth Doctor. He would encounter the Fifth Doctor again, and, later, have one brief encounter with the Sixth Doctor.

Biography
The Master arrived in Camelot just after the coronation of King Arthur, and became the new Merlin after the old one died. He planned to make Arthur believe Mordred was dead so Mordred would grow up to kill Arthur at the battle of Camlan. When the Master saw that the Fifth Doctor and Tegan had arrived, he left the court and hurried to his TARDIS to retreat, while the Doctor suggested Arthur create the Knights of the Round Table to prepare for when Mordred came. (PROSE: The Creation of Camelot)

The Master next travelled to London in the 20th century, at a point when radios were becoming widespread in the population, making his lair in the Post Office Tower by hypnotising a group of workmen carrying out repairs. He then used the Tower to take over the air, broadcasting his hypnotic abilities throughout the city at set times, with the goal of gathering a hypnotised crowd at the State Opening of Parliament to lynch the politicians and the British Royal family and make himself the dictator of the British Isles. However, he made the mistake of testing his hypnosis a few days early by getting a small crowd to stand around the House of Parliament to await instructions for almost an hour. Though this trial run went smoothly, it attracted the attention of the Chief Inspector, who called in the Sixth Doctor and Peri Brown for help.

The Doctor quickly figured out the Master was behind the plot, and hunted him down to the Post Office Tower, where he recognised the Master on sight. Confronted with the armed forces brought by the Doctor and the Chief Inspector, the Master quickly admitted defeat, on the condition that he personally switch off the central hypnosis device. In the process, he also pressed the controls of his invisible TARDIS and vanished, flashing a malicious smile at Peri. (PROSE: The Radio Waves)

Appearance
In all three of these encounters with the Doctor, the Master inhabited a body with pale skin, prominent cheekbones, a neatly-trimmed black goatee, and voluminous hair with a widow's peak. (PROSE: The Creation of Camelot, The Fellowship of Quan, The Radio Waves) He possessed a large green cloak or cape. (PROSE: The Creation of Camelot, The Fellowship of Quan) While dressed in period-appropriate noble garb in Camelot, (PROSE: The Creation of Camelot) he wore

Behind the scenes
This Master was termed a "generic" Master by The Essential Doctor Who #4's feature on The Radio Waves. With World Distributors, who published the Doctor Who Annuals, having failed to secure the rights to the likeness of either Roger Delgado or Anthony Ainley, this unique design, resembling a blend between the two but not legally recognisable as either, was created instead. The stories had likely been written on the assumption that the Master was Anthony Ainley's version and gave no explanation for the Master's manifestly different appearance, leaving this incarnation's place in the Master's overall timeline up to reader interpretation.