4.7 The Unicorn and the Wasp

Written by Gareth Roberts
Directed by Graeme Harper
Produced by Susie Liggat
Executive Producers:

• Russell T Davies
• Phil Collinson
• Julie Gardner

Length: 45 minutes

The Doctor and Donna arrive at an English country manor in 1926 amidst rumours that a jewel thief nicknamed “the Unicorn” is at large. But these stories are overshadowed by a murder in the library, and the timely arrival of famed mystery writer Agatha Christie. As the body count starts to climb, the Doctor and Agatha join forces, while Donna discovers that the murderer may be none other than a giant wasp.

Air Date: 17/05/08
Viewers (millions): 8.41

Cast:

• David Tennant (the Doctor)
• Catherine Tate (Donna Noble)

Guest Stars:

• Fenella Woolgar (Agatha Christie)
• Felicity Kendal (Lady Clemency Eddison)
• Felicity Jones (Robina Redmond)
• Christophor Benjamin (Colonel Hugh)
• Tom Goodman-Hill (Reverend Golightly)
• Ian Barrit (Professor Peach)
• David Quilter (Greeves)
• Adam Raynor (Roger Curbishley)
• Daniel King (Davenport)
• Charlotte Eaton (Mrs Hart)
• Leena Dhingra (Miss Chandrakala)

Next Episode: Silence in the Library

Previous Episode: The Doctor's Daughter