The First Men in the Moon (2010)

Mark Gatiss's adaptation of HG Wells's science fiction classic. 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.

Unfortunately the movie The First Men in the Moon is not yet available on HBO Max.