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.
Did You Know?
In this episode we get to follow Kirk behind the large engine room machinery components in the first trip to the engineering deck (which dialog identifies as being in the lowest parts of the ship). To allow this to happen, the new set had to be temporarily expanded to hide the sound stage beyond it. After the double is rendered unconscious by the first neck pinch in the series, the quickly-assembled wall behind the three characters can be observed to have a very rough edge where it meets the floor. Pieces of sets that were designed to be added and subtracted easily were called "wild." Although Kirk pursues Ben Finney into these components in Star Trek: Court Martial
(1967), this is the only time we get to see the space behind them. The view of the tubed structures behind the grille was a forced perspective set. The tubed machinery appears to be many dozens of meters long, but this is an illusion created by making each vertical piece much smaller than the one in front of it. Diminishing numbers were later printed on the tubes immediately behind the grid to add to the illusion. In episodes where the engines were under stress, lighting effects were used inside the tubed-machinery room. The set was extensively remodelled between the first and second seasons. See more
When Sulu, stuck on Alpha 177, comments on his communicator about "the skiing season opening down here" to Good Kirk in the briefing room, Spock enters, sits at the computer console and interrupts their discussion, pressing his communicator button on his console. The communication console's white "in use" light does not illuminate yet Spock clearly makes contact with Sulu. See more
Temperature's starting to drop?
Captain James T. Kirk
Yeah. At night it gets down to 120 degrees below zero.
Theme From Star Trek
Written by Alexander Courage See more