Jeremy Fitzoliver

Jeremy Fitzoliver was an upper-class photographer and occasional companion of the Third Doctor.

Biography
Fitzoliver was not popular at the Metropolitan magazine. Sarah Jane herself could barely stand him. He got the job mainly because his father was a majority shareholder of the magazine's publisher. (PROSE: Island of Death) He first got involved with the Doctor's affairs through his colleague, Sarah Jane Smith, when her editor provided her with Jeremy as a photographer for a story that the editor didn't take seriously. Although Jeremy ended up accompanying the Doctor and the Brigadier when they had to travel to another planet to rescue Sarah, this was only because the Doctor asked Jeremy to take his toolbox into the TARDIS and forgot to tell him to stop. (AUDIO: The Paradise of Death)

The Doctor took Jeremy on multiple adventures. In one, Jeremy was fiddling with the controls when he accidentally released a burst of temporal energy, which caused Jake Morgan, a man standing near the TARDIS, to cross into a different phase of reality, where he could not interact with anyone. The Doctor was unable to bring him back, only to send him into his own phase of reality to live out eternity. Morton left after he spoke to his fiancée one last time. (PROSE: The Dead Man's Story)

The Doctor and Jeremy then landed on Sedna, where Siccati were attacking their own people. The Doctor requested a meeting with the Arrangers, who would only meet those who presented them with art masterpieces. The Doctor was annoyed at having his painting denied, when Jeremy was taken on a tour of the city with his poorly-constructed vase. The Doctor and Jeremy discovered that the Arrangers wanted to make the planet a perfect piece of art. Jeremy asked why his art was accepted, and one of the Arrangers admitted that in a search for perfect art, he admired the vase's lack of perfection. The Doctor pointed out that meant that something that was "not" perfect "could" be beautiful, and the Arrangers, accepting this argument, left the planet alone. (PROSE: Sedna)

The Doctor, Sarah, Jeremy, and the Brigadier travelled to San Stefano Minore and encountered ghosts crossing from Null-Space to Earth. (AUDIO: The Ghosts of N-Space)

It was hinted that he lost his memory messing around with one of the Doctor's inventions and that he became the antagonist "John Doe", who was manipulated by powerful psychic aliens to assist in their escape from a prison dimension before their plans were thwarted by the Sixth Doctor, their other agents killing John Doe before the Doctor could meet him face-to-face. (PROSE: Instruments of Darkness)