Planet (Return of the Trods)

An Earth-like planet was the location where the Master of the Trods planned to punish the First Doctor, John and Gillian for defeating the Trods on Trodos. He constructed a city in which buildings were booby-trapped, then drew the TARDIS to his world. However, they were able to escape the traps and avoid the Trod patrols. They confronted the Master in his tower, who accidentally fell to his death, and commanded the Trods to destroy themselves. (COMIC: Return of the Trods)