Jack (Death to the Daleks)

A spaceman, known as Jack, was part of the Marine Space Corps expedition to Exxilon in search of the rare mineral parrinium, which was found in vast quantities on that world and desperately needed to cure a galactic plague.

While investigating the surface of the planet one night, shortly after the MSC spaceship was forced down by the power drain caused by the glowing beacon atop the Great City of the Exxilons, he was killed by an Exxilon spear and tumbled down a slope straight into a lake.

When he failed to return, two of his colleagues, Captain Richard Railton and Dan Galloway, went out the next morning to try to find him but, on returning to their base with the Third Doctor, had to tell Jill Tarrant that their search had been unsuccessful. (TV: Death to the Daleks)

Behind the scenes

 * The spaceman was played by Terry Walsh, who was uncredited on-screen for part one but credited in Radio Times.