Spock's Logic Can Be Most Annoying (March 1, 2015)

"We cannot return him to Earth, Captain." Mr. Spock said. "He already knows too much about us and is learning more. I do not specifically refer to Captain Christopher, but, suppose, an unscrupulous man were to gain certain knowledge of man's future. Such a man could manipulate key industries, stocks, and nations, and, in so doing, change what must be. And if it is changed, Captain, you and I, and all that we know, might not even exist."

"Your logic can be most annoying." Captain Kirk said.