The one-off drama, adapated by and starring Mark Gatiss (The League Of Gentlemen), airs at 9pm on Tuesday 19th October on BBC Four.

“July 1969, and as the world waits with bated breath for the Apollo astronauts to land on the Moon, a young boy meets 90-year-old Julius Bedford. He’s a man with an extraordinary story of how, way back in 1909, he got to the Moon first, and, together with the eccentric Professor Cavor, discovered a terrifying secret deep beneath its seemingly-barren surface.”