Tom Osgood

Sergeant Tom Osgood was a UNIT technical officer who served under Brigadier Lethbridge-Stewart.

Osgood joined UNIT shortly before the Third Doctor's arrival, as a corporal. He was the most technically proficient UNIT soldier, having attended universities, where he studied scientific subjects, although he admitted that he was out of his depth where the Doctor and Liz Shaw were concerned. (PROSE: The Eye of the Giant)

After he was promoted to sergeant, (PROSE: The Scales of Injustice) he was called in to assist in the rescue of the Doctor, Jo Grant, Sergeant Benton and Captain Yates from the heat barrier that surrounded Devil's End. With the Doctor's help, he devised a way to penetrate the heat barrier. (TV: The Dæmons)

Soon after this, Osgood became engaged to a woman named Becky, whom he met at a folk festival. (PROSE: Dancing the Code) By 1983, Osgood and Yates had set up tiny tea-rooms just outside Reading. (PROSE: Business Unusual)

In 2001, Osgood was a civilian in his fifties. He was brought in to help UNIT and the Sixth Doctor with an alien incursion. (PROSE: The Shadow in the Glass)

Osgood was invited by the Eighth Doctor to have Christmas dinner at the Brigadier's house. (PROSE: Faithful Friends: Part 3)

Behind the scenes

 * Osgood's first name was never given on-screen, only in the novels The Eye of the Giant and The Scales of Injustice, as well as in the comic story Official Secrets.
 * Osgood shares the same surname as the UNIT scientist Osgood. Both also sport similar thick rimmed glasses. In DWM 484, Steven Moffat admitted his intention when writing was for Osgood to be the daughter of Tom Osgood. However, he did not want to state this definitively in the script as to not confuse or annoy some viewers. In the audio story Power Cell, Osgood responds to the suggestion that she had an "uncle who used to run around shooting aliens" by saying "Something like that". This is consistent with both the theory that Tom Osgood is Osgood's father and with the lack of definitive confirmation.
 * Due to the popularity of the scientist Osgood that was introduced in the Matt Smith era, Tom has seen more use in Titan comic stories published in the 2010s as part of the UNIT family of the Jon Pertwee era. He has often been illustrated with some similar characteristics -- such as the use of an inhaler.

Tom Osgood