It's like The Village That Time Forgot!'

The inhabitants of the quiet seaside town of Thorington in Suffolk are living the same day over and over again.

What's so special about the 1st of September 1991? Why haven't the villagers noticed that the same song has been number one for years? And just where on Earth has the sea disappeared to?

The Doctor and Lucie must solve the mystery before the 'visitors' return...