While beaming back aboard the Enterprise, a transporter malfunction results in two vastly different Captain Kirks being beamed aboard. His personality has in effect been split into two. One Captain Kirk is weak and indecisive, fearful of making any kind of decision; the other is a mean-spirited and violent man who likes to swill brandy and force himself on female crew members. Meanwhile, as Scotty struggles to repair the transporter, the landing party is stuck on the planet below with temperatures falling rapidly. Written by
Did You Know?
The subplot of Sulu and three crewmembers stranded on the freezing planet was not in Richard Matheson
's original script but was added by staff writers. Matheson did not like that this was done. See more
After the dog-like creature dies, Dr. McCoy orders an autopsy on the animal; the term he should have used is "necropsy", which is used to describe post-mortem examinations on animals. See more
Captain James T. Kirk
The impostor's back where he belongs. Let's forget him.