Doctor Who: The Unicorn And The Wasp

In BBC One's Doctor Who tonight, the Doctor and Donna join forces with the world's most famous crime novelist, to encounter a body in the library, poisoned cocktails, and a vespiform seeking revenge.

In 1926, Agatha Christie disappeared for 10 days. Was it amnesia? A nervous breakdown? Or a giant alien wasp..?

David Tennant plays the Doctor and Catherine Tate plays his new companion Donna Noble.

Felicity Kendal and Fenella Woolgar guest star.

Doctor Who: The Unicorn And The Wasp (series 4, episode 7/13), BBC One, Saturday 17 May 2008, 7pm.