Epajaenda, later known as the Epajaenda Resource Sphere, was the home planet of the Travellers.
The Travellers made a deal with the DC Mining Company, allowing the company to use the planet's resources and eventually turn the planet into a dump. At the last moment, the founder of the firm, Abraham Derris-Cuthbertson rescinded the dumping and honoured the terms of his contract with the Travellers.
The Seventh Doctor and Ace visited Epajaenda at this time and enjoyed the hospitality of the Travellers. (PROSE: Last Rites)