The planet of the dwarfs was where Jason Wurlitzer was flying his private rocket-plane when he was kidnapped by dwarfs who demanded a ransom of his father. Unwilling to give them the three million tonnes of uranium they were asking for the return of his son, as they'd be able to build nuclear rockets, Kurt Wurlitzer, one of the most powerful men in the universe, enlisted the Second Doctor to rescue Jason with a team of his choice.
The planet's surface was a dense jungle of "strange plants". Aside from the dwarfs, the planet also had a giant beast, which was taken down by Hik Wellar, one of the Doctor's rescue team. Jason was kept in an underground facility. (COMIC: Operation Wurlitzer)