Death in the Clouds

Death in the Clouds was a murder mystery novel by Agatha Christie which was first published in 1935. It was one of Christie's Hercule Poirot novels. Part of the novel's plot (involving a wasp) may have been subconsciously influenced by an adventure Christie shared with the Tenth Doctor and Donna Noble. It was one of a number of Christie's works to be preserved through human history, with an edition owned by the Doctor carrying a publishing date of the year 5 Billion. (TV: The Unicorn and the Wasp)

In The Writer's Tale, Russell T Davies recalls that he and scriptwriter Gareth Roberts were having trouble working out the monster Agatha Christie would face in The Unicorn and the Wasp:

We really couldn't think what sort of enemy she should fight. Dickens? Ghosts. Shakespeare? Witches. But Agatha...? Then Gareth came up with a wasp - and I remembered the old paperback cover of Death in the Clouds, which has a plane being attacked by a symbolically giant wasp. "That'll do", we said. Our most tenuous link yet.