Dr Who Meets the Watermen

The Doctor and his companions notice a space ship, which lands near them. A group of aliens emerge, and declare that they are the Watermen from Q20. One of the Watermen explains that their ship has broken down, and the Doctor decides to investigate. Upon close inspection, he discovers that it is simply the effect of a minor wiring fault, and after he is able to fix the problem. As the Watermen blast back off towards Q20, the Doctor notes that it is going to be a 5 million light-year journey.