Frank Hobson

General Frank Hobson was a high-ranking officer in charge of the nuclear submarine HMS Revenge, a last-resort retaliation.

In an alternate Earth, he was Jo Grant's uncle and helped her get a job at UNIT. (PROSE: Blood Heat) In the Doctor's universe, Jo's uncle was Jack Canning. (PROSE: The Touch of the Nurazh)

In the alternate Earth, Hobson entrusted part of the book Computer Control Related Missile Launch Protocol Manual to Jo. It contained nuclear missile launch codes. He was going to use them to destroy the Silurians from the hidden Revenge. His plan was delayed for twenty years since Jo had become feral from race memory malaise and she was not found until 1993. When he finally got the codes, he took the submarine to carry out his plan, but died before he could fire the missiles. (PROSE: Blood Heat)

Having visited the alternate timeline, Benny Summerfield was aware of Hobson and Revenge. During the Ice Warrior annexation of Britain, she startled Lethbridge-Stewart by asking if he was thinking of contacting Hobson. (PROSE: The Dying Days)