Doctor Who Series 4 - The Unicorn and the Wasp Trailer

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 suspense novelist Agatha Christie -- during a period in history when the Doctor knows that she is supposed to have vanished without explanation for several days. As the body count starts to climb, Donna is menaced by what appears to be a giant wasp, and only the Queen of Crime can help the Doctor to unravel the mystery.