After being kept in hypersleep during a long expedition into deep space, an astronaut crew crash-lands in the 40th century on a planet where highly intelligent non-human ape species are dominant and humans are enslaved. ...

Allied agents stage a daring raid on a castle where the Nazis are holding American brigadier general George Carnaby prisoner, but that's not all that's really going on. ...

When a mysterious artifact is uncovered on the Moon, a spacecraft manned by two humans and one supercomputer is sent to Jupiter to find its origins. ...