Planet (The Defeat of the Daleks)

On an unnamed planet, the Daleks had planned to invade. The First Doctor and Ian Chesterton found themselves on this planet and encountered the Daleks.

In order to defend themselves, the Doctor and Ian developed a ray gun. When a group of Daleks found them, Ian fired the gun at a Dalek called DK3, destroying him. Realising that the planet is not defenseless, the Daleks evacuated the planet. (COMIC: The Defeat of the Daleks)