Mission to the Unknown was a recreation of the missing second serial of season 3 of Doctor Who. The story was notable for being the only Doctor Who television story not to feature the Doctor, any of their companions, or the TARDIS. Carefully remade by students, graduates and staff at the University of Central Lancashire on the basis of whatever scripts and production photos from the original lost version could be located, with original production values of the 1960s. It was released as a webcast on YouTube on 9 October 2019, exactly 54 years after the original Mission to the Unknown first aired.

On the planet Kembel, Space Security Service agent Marc Cory is investigating a recent sighting of a Dalek spaceship. His suspicion that the creatures may have established a base proves well-founded. He learns of a plot by the Daleks to invade and destroy the Solar System, but he is discovered and exterminated. The Daleks and their allies vow to conquer the universe, beginning with the planet Earth.