The crew of the Enterprise is infected with a alien compound that alters crewmens' minds and emotions in a way similar to alcohol and is spread by contact. The compound's effects led to the destruction of a science outpost's crew and is inadvertently brought aboard the Enterprise. One crewman locks himself in the engine room and shuts down the warp core, just as the planet beneath them begins to break up.
5.8/10 (4 Votes cast)
Warning: Star Trek season 1 episode 4 guide may contain spoilers