The 40 most popular british sci-fi & fantasy TV shows, ranked. Click any show for ratings, reviews, trailers, and where to watch.








































British television's defining habit is the short series — six episodes, one writer, a finite story. That structure produced the modern prestige miniseries and a format catalogue the rest of the world keeps adapting.
Science fiction and fantasy on television get to build worlds across dozens of hours, which is why the genre's most detailed universes are TV universes. Effects costs long constrained it; streaming budgets no longer do.