Airdate: October 11, 1968
61 of 80 produced
59 of 80 released
Introduction
The Enterprise rushes to respond to a distress call from the science outpost on Triacus. When they arrive, they find that all of the adults have killed themselves, yet the children are strangely sanguine and playful. What can explain this startling incongruity? And will our heroes discover the answer before it destroys them just as it did Triacus?
Or will they all be forced to dress like foofy Christmas trees?
