Triumvirate of Terror! - S3-E8
Plot hole: After Superman thwarts Lex's plan and knocks the Kryptonite into the sewers, Lex yells in frustration, splits his power suit off and flies away on a jet pack. Superman just lets him go. Wouldn't Superman chase him and catch him, especially seeing as how weak Lex would be like that? (00:07:35)
Chosen answer: The Star Sapphires are agents of the Zamarons, the female species of the Guardians of the Universe, they are enemies of the Green Lanterns, which is why Carol has anger toward Hal. It should also be mentioned that the further a ring is from the center of the "The Emotional Spectrum", the more control the ring has over the user.
MasterOfAll