Ivan Asimoff
A science-fiction author from the planet Sigma, Dr. Ivan Asimoff lives with his aunt, and is the creator of Commander Courage, often enacting his character's scenes in his head as he writes his books - sometimes enacting them a little more vigorously than his aunt would like. He first encountered the Doctor's fourth incarnation while visiting the Festival of the Five Planets. The pair were invited by Machine-Head of the Freefall Warriors to accompany him on a test flight, during which they were briefly shot down by raiders from the renegade sixth planet. Having fallen in love with the beauty of the imprisoned Zyglot Polly, Asimoff was on his way to a Save the Zyglot conference when he ran into the Doctor's sixth incarnation. He assisted the Doctor and Frobisher in their pursuit of Astrolabus, and the Doctor in turn donated a large sum of cash purloined from Josiah Dogbolter to the Zyglot Trust.
Behind the Scenes
Created by Steve Parkhouse and Dave Gibbons, with his name a play on famous sci-fi author Isaac Asimoff, Ivan Asimoff not only encountered two incarnations of the Doctor, but even had a solo short story, The Fabulous Idiot, in the 1982 Doctor Who Summer Special.