List of Star Trek: The Animated Series episodes

While exploring on the outermost rim of the galaxy the USS Enterprise is pulled into the orbit of a dead star. Trapped there, the crew discovers that there is an ancient derelict pod ship trapped with them as well.
Kirk and crew beam aboard the huge starship and learn it was once home to an insect race. They also learn that the ship's crew self-destructed rather than carry a malevolent entity to other worlds.

Investigating a sector of space where starships have disappeared every 27 years, the Enterprise finds a race of beautiful women living on the planet Taurus II.
While in the Taurean system signals begin to affect the male crew, causing them to hallucinate. Captain Kirk, Spock, Doctor McCoy, and Lieutenant Carver beam down to the source of the signals.
After arriving on the planet they are taken prisoner by the Taurean women. The landing party begins to age rapidly as a result of life-draining headbands they are forced to wear.

While the USS Enterprise escorts two robot cargo ships carrying quintotriticale, a new seed grain, to famine stricken Sherman's Planet, it encounters a Klingon battlecruiser pursuing a Federation scout ship. When the Enterprise rescues the pilot, the Klingons attack with a new energy weapon and demand that the pilot be handed over to them.
The pilot turns out to be Cyrano Jones, an intergalactic trader well known to Kirk and crew from "The Trouble With Tribbles". The Klingons desperately want Jones for introducing the tribble to Klingon planets where it has become a major pest, and for stealing a glommer, an animal the Klingons were breeding to prey on the tribble.
Kirk expresses sympathy for the Klingons' plight but refuses to hand over Jones, a Federation citizen.
Jones is now selling tribbles genetically engineered to omit their ordinarily unrestrained multiplicative proclivities. Dr. McCoy discovers that although Jones' "new" tribbles don't reproduce, they still have ravenous appetites. Instead of reproducing, they now grow hugely fat.

While visiting the newly discovered planet Phylos, Lt. Sulu picks up a walking plant, called a Retlaw, and is poisoned. The alien species that inhabit the planet, who are plantlike beings, approach and save Sulu's life.
From them the crew discovers that most of the Phylosians were wiped out by a plague brought to the planet by Dr. Keniclius, a Terran scientist who survived Earth's Eugenics Wars.

While exploring near the center of the galaxy, the USS Enterprise is caught inside an energy/matter vortex and all her computer systems fail. A being named Lucien appears on the bridge, repairs the ship's systems and takes the crew to explore his planet, Megas-Tu.

The Enterprise crew revisits the "amusement park" planet first seen in the Classic Trek episode "Shore Leave" hoping for some rest and relaxation.

The disappearance of a scientific team lures the USS Enterprise to investigate near Lactra VII. The starship Ariel is located there, abandoned, with its captain having transported to the planet's surface.