Science Fiction TV Shows

Science fiction is television's idea laboratory. Freed from the present tense, it gets to ask the dangerous questions directly — what makes a person, what do we owe each other, who gets to decide — and smuggle the answers inside starships and paradoxes. The best of it ages strangely well, because good questions don't expire.

The shows here span the genre's whole temperament. Doctor Who has been regenerating its way through time and space since 1963, the most durable format in TV history; Firefly lasted a single season and built a devotion most decade-long shows never earn; and Star Trek: Enterprise charts the scrappy early days of the Federation's grandest dream. Rankings follow our quality score, which rewards sustained acclaim over launch-week noise, with new voyages logged in the recently premiered section.

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