The two primary characters were Rio and Buzz, anthropomorphized Starfleet spacecraft: Rio was a runabout, the Rio Grande, and Buzz was a Starfleet Corps of Engineers Work Bee; both were featured on the cover of the book. Molly O'Brien had Hey! Hey! Little Ship! in her bedroom aboard Deep Space 9 in 2374. (DS9: "Time's Orphan") The cover is barely visible for a few frames in the episode, though it is identified in the Star Trek: Deep Space Nine Companion.