Also known as Doppelgänger, a fun film about the idea that maybe there are two earths, on opposite sides of the sun.
Effects and models are provided by Gerry Anderson. They’re amazing to look at—the special effects budget must have been impressive, even if it doesn’t compare to what we have today in realism.
The writing is pretty dry, and the actors are relative no-namers, but the spectacle more than makes up for it.