15 Most Rewatchable Sci-Fi TV Shows Of The 21st Century

At least one re-watch of Westworld, HBO's mega-budget sci-fi hit, is necessary in order to fully follow what’s going on, since this twisty sci-fi series is fond of dropping bombshell revelations which upend viewer expectations every other week.

But even after you’ve gotten over the constant misdirects and earth-shattering swerves scattered throughout each season, there’s a lot more to enjoy in this expansive adaptation of Jurassic Park author Michael Crichton’s 1973 cult sci-fi Western hybrid.

With an ensemble cast including a career best Evan Rachel Wood and typically superb Thandie Newton, Westworld is a morally grey series which demands repeat viewings due to its knotty plot, but earns them through complex characters and a captivating take on technology, humanity, and the complications of social responsibility in an increasingly automated world.

Also, the killer robot stuff.