UFO: Radar contact... They're landing!(1974)

Original title: UFO Contatto radar... Stanno atterrando!

Fleets of UFOs roam around the Moon Base. One manages to land and is confronted by Colonel Foster who is then accused of treason for having collaborated with the alien pilot in an attempt to survive on the lunar surface. Foster flees, chased by security agents, while Commander Straker and Colonel Freeman investigate to exonerate him.