A recently discovered Class M planet with a primitive native people and a powerful disembodied intelligence that protects them, explored in the Animated Series episode Bem.
Delta Theta III is surveyed by the Enterprise in the Animated Series episode Bem. The crew is to place monitoring devices near a native settlement without being seen, and an honorary commander, Ari bn Bem of the planet Pandro, goes along as an independent observer.
Bem is a colony creature whose body can separate into parts that act on their own. He swaps the landing party's phasers and communicators for fakes and goes off alone, and Kirk and Spock are captured by the reptilian natives while looking for him.
A voice then addresses them. It belongs to a non-corporeal intelligence that regards the natives as its children and will not allow them to be disturbed. Kirk agrees to leave and to have the planet declared off limits, and the intelligence talks Bem out of disassembling himself for good as a punishment for his mistakes.