In the books he's decribed as a blond, good-looking man who's a good talker. He also shows some witty and sarcastic humour when he's with Miss Marple.
In “The Mirror Crack'd from Side to Side” he tells Miss Marple about his mother who died when he was a young boy. He also remembers her death when he thinks about blueberry pancakes.
He is a Shakespeare enthusiast, and at a first glance he likened Phillipa Haymes to Rosalind from As You Like It. He himself had played Jaques in a performance of As You Like It for the Police Orphanage.
He had a great aunt Emma, who had told him that his nose twitched when he was about to tell a lie.
- A Murder is Announced (1950)
- Sanctuary (short story) (1954)
- 4.50 from Paddington (1957)
- The Mirror Crack'd from Side to Side (1962)
- In the four films starring Margaret Rutherford as Jane Marple, Craddock was played by actor Bud Tingwell.
- In the 1980 film The Mirror Crack'd, Inspector Craddock was portrayed by actor Edward Fox.
- Detective Inspector Craddock was portrayed by actor John Castle in 1985 and 1992 in the television series Miss Marple. He reprised the role in the 1999 BBC Radio 4 adaptation A Murder is Announced.
- Actor Alexander Armstrong played D. I. Craddock in the 2005 episode of Agatha Christie's Marple, A Murder is Announced.
- In two adaptations made by BBC Radio 4, 4.50 from Paddington and The Mirror Crack'd from Side to Side, Detective Inspector Craddock was portrayed by Ian Lavender.