Captain Kirk, Mr Spock and the Enterprise crew have discovered that a series of exploding tribbles have been hidden by the Klingons in locations visited by the Enterprise. Kirk and his crew must seek and find each exploding tribble. At the same time, fans must spot items from every story in The Original Series, also concealed in the pictures. This is next-level Where's Waldo for adult fans, plus a chance to save the galaxy into the bargain

The book opens with an article exploring the grand tradition of fans spotting continuity gaffes in the world of Star Trek. Then this is followed by an explanatory spread telling the reader how to use the book. A feedback session at the back clears up all quibbles with tribbles and debates about the non-interference directive

Three levels of engagement:
- TRIBBLE TREK: SPOT the all-important EXPLODING TRIBBLE
- NERD ALERT: Spot five continuity errors, mistakes within the featured episode itself.
- THE ARTEFACT INCIDENT: Find the out-of-context items from other episodes, ten to a spread.