The Enterprise is confronted by a powerful alien, apparently an impudent adult humanoid fascinated with Earth's history, but in reality he is a child, playing with them as if with a toy. It is these aspects which have led fans to compare it with 'Encounter at Farpoint' TNG, and speculate that Trelane is really a Q. He even puts Kirk on trial, just as Q does later with the crew of the 1701-D.
Kirk initially treats Trelane as he would Harry Mudd, playing off his idosyncrasies while looking for a weakness. He mistakenly destroys the mirror in front of the machine from which he thinks Trelane draws his power, just as he would if he found a computer running the lives of the inhabitants of some world, and only then does he realise Trelanes true power.
Although it's fun, I think the story's ending is too similar to 'Charlie X' TOS.
Kirk initially treats Trelane as he would Harry Mudd, playing off his idosyncrasies while looking for a weakness. He mistakenly destroys the mirror in front of the machine from which he thinks Trelane draws his power, just as he would if he found a computer running the lives of the inhabitants of some world, and only then does he realise Trelanes true power.
Although it's fun, I think the story's ending is too similar to 'Charlie X' TOS.