Eaglemoss Publications.The latest special in the STAR TREK: The Official Starships Collection is the Planet Killer, the vast, ancient weapon, capable of destroying whole planets with its devastating proton beam. The Planet Killer appeared in The Doomsday Weapon, a 1967 episode of STAR TREK: THE ORIGINAL SERIES. Measuring 8.5 inches in length, this model of the Planet Killer also features an internal light.