"The Apple" is episode No. 34, production No. 38, of the second season of the original science fiction television series, Star Trek. Written by Max Ehrlich, and directed by Joseph Pevney, it was first broadcast on October 13, 1967, and repeated July 12, 1968.

In this episode, the crew of the Enterprise visits a mysterious paradisical planet controlled by a computer that is served by the local inhabitants.

On stardate 3715.3, the Federation starship USS Enterprise arrives at Gamma Trianguli VI, a planet that appears to be a tropical paradise with very rich natural resources. Captain James T. Kirk leads a landing party including Chief Medical Officer Dr. McCoy, Ensign Chekov, First Officer Spock, Yeoman Martha Landon (Celeste Yarnall) along with other security personnel. They quickly find the paradise is extremely hostile; they lose security members to plants that shoot poisonous darts, explosive rocks composed of uraninite, hornblende, and quartz; soon, bizarre lightning storms follow. Transporting back to the ship is impossible as an energy field is drawing power from the Enterprise rendering the transporters inoperable.

Kirk orders the team towards a primitive village, carefully avoiding the planet's hazards. They find a native of the planet watching them from nearby bushes. The frightened native, Akuta (Keith Andes), says he is the chief of the people known as the "Feeders of Vaal". Small antennae on Akuta's head allow him to communicate with "Vaal", acting as the entity's eyes and ears for his people. During this, Chief Engineer Scott reports that the Enterprise is slowly being pulled towards the planet by a tractor beam. Kirk, suspicious of the "Vaal" entity, asks Akuta to take them to it. Akuta leads them to a rock formation that has a dragon-like head figure on one side. Spock's analysis shows that the entrance is protected by a force field, but appears to lead to an underground complex with a computer system, perhaps constructed by a long-dead civilization, which he believes is what is affecting the Enterprise. Akuta says that Vaal may wake to speak with them, but in the meantime, offers to show the crew his village.

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