Iron Sky - the Coming Race

Sci-fi comedy sequel directed by Timo Vuorensola. After Earth is destroyed by nuclear war a sparse population of survivors take up temporary residence on the dark side of the Moon. When rumours surface about a hidden city in the hollow core of the Earth a small crew of humans go to investigate if it will be possible to reside there permanently.

However, once they arrive they find that the city is populated by the Moon Nazis led by Adolf Hitler (Udo Kier). If they wish to save mankind they must first defeat Hitler and his army of evil reptilian creatures before it's too late.