ST.TOS The Menagerie, Parts I & II
Star Trek: The Original Series, Season 1, Episodes 11 & 12
Spock stands trial for following his conscience instead of Starfleet rules. But why, oh why, is Talos IV so bad that visiting it warrants death? And this may be the strangest trial we've seen so far. We have mixed feelings about this episode, but it's definitely a head-scratcher.