The alien in this film made ET look like the alien in "Alien" it was no more threatening than Sooty. Would children even back in 1956 take this film seriously, I doubt it as they probably laughed at the puppet alien. Probably a unique film due to the sillyness of it all but worth a watch for curiosity value. The chief baddy had a very posh accent which was a bit strange, but all of the children were also posh.
Review of Supersonic Saucer
