William Shawcross' search for love stops when he sees Mary Gilcrest. But their first date is a disaster, and it's not helped when, at the worst possible time, she discovers he's an undertaker.
The Indian Ocean, 1935 - or is it? The Doctor and Jo arrive on the SS Bernice, a ship due to mysteriously vanish without trace. But why do events seem to repeat themselves, and why is a plesiosaur attacking the ship? Meanwhile, on the planet Inter Minor, travelling showman Vorg arrives with his remarkable Miniscope...