When the writers of Star Trek: Deep Space Nine were looking for the perfect episode with which their characters could pay homage and interact with the crew from the original Star Trek , "The Trouble with Tribbles" instantly came to mind.
Here is the story of how the wizards of Star Trek were able to create the magic that enabled- with nothing more than countless hours of work- ordinary actors to time-travel. This is the story behind the creation of the episode "Trials and Tribble-ations." This is The Magic of Tribbles.