Let That Be Your Last Battlefield

Season 3, episode 15. The Enterprise runs across a shuttle craft stolen from Starbase 4. It appears that the creature aboard is suffocating, and maybe injured so they use a tractor beam to bring in the craft and out steps off an alien that falls over - a black and white unknown species of alien. The alien is taken sickbay where McCoy does what he can for him, he revives and revels he is Lokai from the planet Cheron, a a political refugee and he requests asylum. Kirk wants to bring him to Starfleet for stealing Federation property (the shuttle craft) but Lokai insists he's not a thief but simply using it and would have returned it when he got to his destination. Then another craft appears - an alien scout vessel. Hailing it does not work, it's invisible to the eye but the ships scanners can pick it up... it is on a collision course with the Enterprise but then dissipates while dropping off the alien Bele inside the bridge. Bele wants to see Lokai but Lokai does not want to see him. Lokai claims to be a slave and Bele's kind to be murders and more, Bele claims that is untrue and that Lokai is a prisoner plus he insists to go to Cheron. Kirk reminds Bele that the Federation has no treaty with them and once the Enterprise is done with their mission they will take them to a Federation base to settle this matter. Then Bele takes over the ship telepathically, to Cheron they go. Now Kirk has to get his ship back and do something with the two black and white unknown species of aliens.

Lokai's right side is white and left side is black while Bele's face is just the opposite - that gives the viewers an idea which one is evil, which one is good; which one is possibly a ruler/police which is possibly slave. Which is telling the truth which is lying.

An episode that has intense moments executed very well - even though you know everything will be okay in the end. And it's great to see Frank Gorshin outside of the role as The Riddler.

9/10