TEXT: The peace and quiet of the garden of a manor house is disturbed by the sound of the TARDIS materializing. The Doctor steps out, followed by Donna. There's a loud buzz as they walk towards the house. DOCTOR: Smell that air. Grass and lemonade... and a little bit of mint. A hint of mint, must be the 1920s. DONNA: You can tell what year it is just by smelling? DOCTOR: Oh yeah! DONNA: Or maybe that big vintage car coming up the drive gave it away. A vintage car pulls up at the entrance to the manor. The butler, Greeves and a young footman, Davenport come out of the house. GREEVES: The Professor's baggage, Richard, step lively! Davenport goes for the baggage, while Professor Peach steps out of the car and walks to the entrance. GREEVES: Good afternoon, Professor Peach. PROFESSOR PEACH: Hello, Greeves old man. A vicar rides up the drive on his bike. PROFESSOR PEACH: Ah, Reverend. REVEREND: Professor Peach! Beautiful day. (he gets off the bike). The lord's in his heaven, all's right with the world. GREEVES: Revered Golightly. Lady Eddison requests you make yourselves comfortable in your rooms. Cocktails will be served on the lawn from half past four. PROFESSOR PEACH: You go on up, I have to check something in the library. REVEREND: Oh? PROFESSOR PEACH: Alone. REVEREND: This is supposed to be a party! All this work will be the death of you. During this, the Doctor and Donna have been hiding in a bush, listening in on the conversation. DONNA: Never mind Planet Zog, a party in the 1920s, that's more like it! DOCTOR: Problem is, we haven't been invited. (he gets the psychic paper out, grinning) Oh I forgot, yes we have! [SCENE_BREAK] In the library, Professor Peach is examining a piece of paper closely with his spectacles on.
SUMMARY:
The Doctor and Donna invite themselves to a dinner party in 1926, hosted by Lady Clemency Eddison and Hugh Curbishley, where one of the guests is Agatha Christie . The Doctor realises that they have arrived on the day Agatha inexplicably disappears. A giant shapeshifting alien wasp in human form called a Vespiform kills three of the guests with methods similar to the murders in Agatha's murder mysteries. The Vespiform is revealed to be Lady Eddison's illegitimate half-human son, Reverend Golightly. Golightly, who has a telepathic link with Lady Eddison through her necklace, became aware of his alien nature and absorbed the details of The Murder of Roger Ackroyd , an Agatha Christie murder mystery his mother was reading at the time. He transforms into the Vespiform and threatens the guests. Agatha lures him towards the Silent Pool . Donna throws the necklace into the water, and the wasp dives after it and drowns. Due to her own connection with the necklace, Agatha falls unconscious and suffers from amnesia . This becomes the event that gave her the amnesia during her disappearance, and the Doctor drops her off at the Harrogate Hotel .