''Deep Blue'' is a

BBC Books BBC Books (also formerly known as BBC Publishing) is an imprint majority-owned and managed by Penguin Random House through its Ebury Publishing division. The minority shareholder is BBC Studios, the commercial subsidiary of the British Broadcasti ...

original novel written by Mark Morris and based on the long-running British

science fiction television Science fiction first appeared in television programming in the late 1930s, during what is called the Golden Age of Science Fiction. Special effects and other production techniques allow creators to present a living visual image of an imaginary ...

series ''

Doctor Who ''Doctor Who'' is a British science fiction television series broadcast by the BBC since 1963. The series depicts the adventures of a Time Lord called the Doctor, an extraterrestrial being who appears to be human. The Doctor explores the u ...

''. It features the

Fifth Doctor The Fifth Doctor is an incarnation of the Doctor, the protagonist of the BBC science fiction television series ''Doctor Who''. He is portrayed by Peter Davison. Within the series' narrative, the Doctor is a centuries-old alien Time Lord from t ...

Tegan Tegan is a given name of Welsh origin. It is a diminutive of the Welsh word ''teg'' ('fair') and means 'darling', 'loved one', or 'favourite', and is the normal Welsh word for 'toy'. People with the name Notable people with the first name Tegan i ...

, Turlough, and members of

UNIT Unit may refer to: Arts and entertainment * UNIT, a fictional military organization in the science fiction television series ''Doctor Who'' * Unit of action, a discrete piece of action (or beat) in a theatrical presentation Music * ''Unit'' (alb ...

, mostly embodied by Captain Mike Yates.

External links

* 1999 British novels 1999 science fiction novels Past Doctor Adventures Fifth Doctor novels Novels by Mark Morris {{1990s-DoctorWho-novel-stub