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Jonathan Frakes (0.84) and Doctor Who (0.77) form two distinct poles in Star Trek's top 10 — one anchored in cast members, the other in a rival sci-fi franchise — and the gap between them defines the shape of this audience.
The similarity scores here measure how closely another entity's audience composition resembles Star Trek's. The top five neighbors are all actors: Jonathan Frakes at 0.84, Jeri Ryan at 0.84, Brent Spiner at 0.82, Michael Dorn at 0.81, and William Shatner at 0.79. That cluster is tight and coherent — audiences shaped by individual cast members track closely with the franchise itself. Then Doctor Who enters at 0.77 as the first non-actor and the only TV show in the top six, representing a second, distinct neighborhood: long-running sci-fi television fandom rather than franchise-specific cast loyalty. Below that, Weird Al Yankovic (0.74) and Wil Wheaton (0.74) extend the cast-adjacent cluster, while Star Trek on Paramount+ (0.72) and Seth Green (0.71) round out the ten. No other Movie Franchise appears in the top 10; Star Trek's nearest neighbors are almost entirely individual actors and a single competing sci-fi property.
The two-peak structure reveals an audience that organizes around personal attachment to cast members on one axis and genre-franchise loyalty on the other.
