After a cataclysmic disturbance threatens the foundation of civilization, Captain Kirk comes face-to-face with the culprit -- a maniacal lunatic named Lazarus, who will stop at nothing to destroy a duplicate version of himself who exists in a parallel universe. With the fate of the galaxy hanging in the balance, Kirk and Spock must figure out a way to stop the matter and anti-matter versions of Lazarus from coming together, or they will wipe out everything in existence. After producing 20 prior episodes of groundbreaking television, it was only a matter of time until "Star Trek" came up short with a colossal failure. The concept was ambitious, but the episode that came out of it was convoluted, confusing and boring -- and it made absolutely no sense whatsoever. It was a troubled production all around, no doubt hampered by the casting of Robert Brown, who was called in at the 11th hour to replace the episode's original guest star. But true to form for "Star Trek," "The Alternative Factor" does have its merits, and our revealing deep dive conversation about the drama behind the scenes makes for a fascinating episode of "Enterprise Incidents!"

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