"The Jihad" is one of the best episodes of the animated Star Trek series. The Skorr are a species of flying creatures that were once mighty warriors and conquerors. However, they have become benevolent due to the influence of the Soul of Alar. Someone has taken it and the Skorr, which are capable of massive, rapid reproduction, are threatening a Jihad or holy war against the rest of the galaxy.
The Vedala, the first species to develop space travel capability, have called together representatives of several species to go to the planet where the Soul of Alar is located. Kirk and Spock are the two humans selected for the dangerous and likely suicide mission on a planet with a dynamic and deadly climate. Along with members of other species, including a Skorr, they are transported to the surface of the planet and embark on their quest.
After a great deal of effort and some teamwork, they discover the Soul of Alar and learn that some of the Skorr are behind the theft. It is their belief that their race has grown soft and complacent and a holy war against the galaxy will reinvigorate their species. After a brief conflict, Kirk and company are able to retrieve the Soul and war is averted.
"The Terratin Incident" is one of the weaker episodes in the animated series. The Enterprise arrives at a planet and suddenly the crew members begin shrinking. Nothing they do prevents it and finally, Kirk beams down to the surface, only to discover that he has been restored to normal size. He beams back to the Enterprise and discovers that some of his crew is down on the surface. The inhabitants of the planet have over time been subjected to radiation that shrinks their size. They were human colonists, but their planet is self-destructing. With their communication facilities destroyed, their only way of contacting the Enterprise was to shrink them down to their size. In another instance of debatable use of transporter technology, the transporter is used to restore the crew to their original size.
I dislike the use of the transporter to restore a damaged, altered or diseased human to their original form. This would be an easy way to attain immortality or clone yourself, yet these major consequences never seem to be addressed.