For kids of the ’60s, it was a thrilling weekly ride and for adults revisiting it later, it became a time capsule of an era when television dared to mix earnest family drama with outlandish spectacle.

Lost in Space premiered on Sept. 18, 1965, and ended its run on March 6, 1968, so the Jupiter 2’s adventures are long over, and Will Robinson hasn’t been in danger for more than half a century (unless ...