There is no such thing as a good night. Maybe, as you fall asleep, you can hide away in dreams. Safely tucked up in bed, nothing can touch you. Or so you'd like to think. Because, as every child knows, there are bad dreams. And bad dreams are a glimpse into the real world - where the monsters are. The Doctor knows all about monsters. And the things in your nightmares that are worse than monsters: the creeping black memories that can bring fear and pain and blood. Even here, today, tonight ...in the most ordinary of homes, and against the most ordinary people, the terror will strike. An old man will tell his last ghost story...A young family will encounter a deathless horror...And the Doctor and his friends will uncover the terrible secret of the Deadstone Memorial.