(Nightmare of Eden)
Savage world where the deadly Mandrels originated. Tryst used his CET machine to capture several Mandrels to supply Dymond with vraxoin. Stott had been left to die on Eden (5K).
- BLOOD Creatures who fed on blood included the Screamers of Desperus (V), the Ogri (5C), the Somno-Moths from Eden (5K
- MANDRELS Savage monsters from the planet Eden. Tryst discovered that the deadly drug vraxoin could be manufactured from the Mandrels' essence after they had been destroyed by heat. He used his CET machine to capture and transport the Mandrels, but they escaped after the Empress and the Hecate crashed above the planet Azure when both ships simultaneously emerged from hyperspace. The Fourth Doctor lured the Mandels back to the Eden projection inside the CET (5K).
- The Fourth Doctor used a dog whistle to summon K9 and, once, charmed the Mandrels with music
- SECKER Navigator of the Empress. He was a vraxoin addict, in league with Tryst and Dymond. His negligence caused the ship to crash into the Hecate when emerging from hyperspace above planet Azure. Secker was killed by a Mandrel (5K).
- SOMNO-MOTH Native creature of Eden which rendered its victims unconscious with a mild narcotic, before taking some of their blood. A somno-moth from Tryst's CET escaped and attacked Romana aboard the Empress (5K).
- STOTT Third member of Tryst's Volante zoological expedition. In reality, he was a Major in the Intelligence Section of the Space Corps on a drug-running assignment. He was in love with Della. Tryst shot him and left him to die on Eden, but he was caught up in the CET. He escaped after the Empress crashed into the Hecate above the planet Azure, and helped the Fourth Doctor and Romana expose Tryst and his fellow vraxoin smuggler, Dymond (5K).
- TRYST Professor of interplanetary zoology whose ambition was to catalog every species in the galaxy. Tryst's expedition on the Volante was comprised of his assistants, Della and Stott. In order to secure funding for his research, Tryst decided to smuggle the drug vraxoin, which he had discovered could be derived from the essence of the Mandrels, savage monsters from the planet Eden. Tryst shot Stott, and used his CET machine to capture the Mandrels and hand them to drug smuggler Dymond. After the Empress crashed into the Hecate, Tryst tried to frame the Fourth Doctor but was eventually exposed by the Time Lord and Stott. He and Dymond were arrested (5K).
- VRAXOIN Deadly drug in use among humans in the early part of the 22nd Century. It induced a state of warm complacency, followed by agonizing withdrawal symptoms, and eventually death. The Fourth Doctor exposed two vraxoin smugglers, Tryst and Dymond, after the Empress crashed into the Hecate when emerging from hyperspace above the planet Azure. He also discovered that vraxoin was derived from the essence of the Mandrels, savage creatures from the planet Eden (5K).