The film is notable for being the only occasion future British film stars Michael Caine and Oliver Reed shared a scene together. It takes place at a cinema lobby, where Reed plays a Teddy Boy and Caine a sailor; it lasts only a few seconds.
When Puckle views the Earth from the spaceship (c. 128 minutes) he sees lines of latitude and longitude, and countries marked in various colours, just as an inflatable plastic globe atlas usually has.