The weirdest alien of the galaxy pays a visit to Earth... Jerry Lewis is Kreton, a childish alien who, against his teacher's will leaves his planet to visit the Earth, and lands in the backyard of a famous television journalist who doesn't believe in UFOs and aliens. Wanting to study humans but not able to fully understand them, Kreton makes a mess out of it, generating a lot of comic situations.
Jerry Lewis
as Kreton
Joan Blackman
as Ellen Spelding
Earl Holliman
as Conrad
Fred Clark
as Major Roger Putnam Spelding
John Williams
as Delton
Jerome Cowan
as George Abercrombie
Gale Gordon
as Bob Mayberry
Lee Patrick
as Rheba Spelding
Milton Frome
as Police Commissioner
Ellen Corby
as Mrs. Mabel Mayberry
Paul Smith
as Delton’s Assistant
Paul Wexler
as Beatnik
