The U.S.S. Constellation and its crew were destroyed by a giant robot ship which consumes planets for fuel, leaving only a guilt-ridden Commodore Decker aboard the crippled ship. Kirk beams over to begin repairs while Decker beams aboard the Enterprise. After Kirk loses radio contact with the Enterprise, the obsessed Commodore seizes command of the starship, determined to destroy the planet-killer, even at the cost of Kirk's ship and the entire crew. Written by
Did You Know?
This episode marks the debut of the re-designed engineering set. The dilithium crystal storage units now occupy the center of the floor (complete with recycled Horta eggs), a ladder and upper level have been added into what was just a high bank of lighted panels in the first season. The set also is entered through a short spur hallway now, rather than as a side door off a main corridor. The console across from the forced-perspective end of the set has been replaced by a doorway and moved to the main wall to the left of the red grid. The huge structures among which Kirk's evil self and Ben Finney once hid are not seen in detail again, but the emergency manual monitor set was built on stilts on that spot, making its debut in "Mirror, Mirror". See more
When Commodore Decker and the security guard fight during Decker's escort to sickbay, it's easily seen that a stunt double is portraying Decker. See more
It's closing fast on the Constellation.
Standing by, sir.
Commodore, I suggest...
Kirk pulled us out of there by distracting it. Now it's our turn. Fire phasers.
[the Enterprise fires upon the planet-killer, causing it to release the Constellation
Did it! Hard about! Give me some distance.
[the Enterprise veers sharply to the left, away from the planet-killer