Harry Sullivan

[close] Surgeon-Lieutenant Harry Sullivan was a companion of the Fourth Doctor. He was a Royal Navy surgeon in the employ of UNIT and later worked for NATO and MI5.

Three weeks after confronting the Great One on the planet Metebelis III, the Third Doctor and his TARDIS re-appeared in his laboratory at UNIT HQ. The Doctor had received a fatal dose of radiation, forcing him to regenerate. Harry Sullivan arrived on the scene just moments after the Doctor regenerated.

After the defeat of the robot K1, Harry found himself in the Doctor's TARDIS. After travelling with the Doctor and Sarah Jane for some time, rejoined UNIT to defeat the Zygons in Scotland. After the Zygons' defeat, Harry decided to return home to London by train rather than by TARDIS.

In the early 1980s, Harry worked at NATO. By 1997, he was Deputy Director at MI5. By 2005, he was back at NATO, having achieved the rank of Commodore. In 2010, Sarah Jane recalled that Harry had worked in developing vaccines that had saved thousands of lives.

Harry was rather old-fashioned and stereotypically English in his attitudes. He often employed slightly archaic language, referring to Sarah affectionately as "old girl" or "old thing" — which somewhat annoyed her. He had a "can-do" attitude, adapting well to the many strange situations in which he found himself. He could, however, be quite clumsy and unsubtle. This led the Doctor to declare in a moment of frustration, at the top of his lungs that "Harry Sullivan is an imbecile!". He flirted a bit with Sarah. Despite an outward annoyance at that attitude, once when thinking him dead, Sarah admitted she found it endearing.