In “The Naked Time,” Enterprise crew members begin acting strangely…because sweat?
In Where No Man Has Gone Before, two crew members acquire god-like abilities.
In Charlie X, the crew of the Enterprise picks up an “unusual” passenger who assaults Yeoman Rand and can make people disappear with his mind.
In “The Man Trap,” the crew of the Enterprise faces off against an alien who needs salt to survive.
“The Cage” was originally intended to be the pilot episode of Star Trek: The Original Series. However, the network refused it and ordered a new one.