Best known for his grand, orchestral scores for films like Jaws and Star Wars, John Williams also composed the theme for a beloved '60s sci-fi series.

If you've watched all the science fiction series on the streaming services you subscribe to, here are some great sci-fi shows ...

Sci-fi is an enduring genre on the small screen, even if the budgets couldn't always match the big screen, and these are the best sci-fi shows ever.

Explore the most ambitious sci-fi TV shows that shaped the genre with their game-changing arcs, production, and characters, from Doctor Who to Lost.