This is the "Guardian of Forever" from the famous episode "City on the Edge of Forever". In which McCoy travels back to New York in the Nineteenthirties, and messes up time, and Kirk and Spock have to follow him to set time straight again. Unfortunately that means that Kirk has to let the woman he fell in love with (played by Joan Collins so who could really blame him?) die.
With this set we get Kirk in yellow (even though every real Star Trek fan knows of course that this was always avocado green) and McCoy and two unnamed redshirts. If I remember correctly, they don't die for a change in this episode.
More pictures behind the cut!
It's only a small set so the box was significantly smaller than the
bridge set or
transporter room set. It was also easier to open, as it only had tape, while the other was glued together:
You even have to put the tricorder together yourself LOL But they got lazy here. In the bridge set, the tricorder and communicator and phasers actually were painted. Guess I'll have to get out my golden and silver sharpie:
The figures. I must admit I can't really recognize Bones here:
It's an easy built set but still beautifully done: