This episode is a dubbed Italian version of the original English episode "The Last Man on Earth", which aired in the United States in 1970.
Therefore, the actors and actresses appearing in this episode are the same as in the original English version:
* Ed Bishop as Commander Edward Straker
* Sylvia Anderson as Dr. Helena Russell
* Michael Billington as Paul Foster
* Gary Myers as Colonel Paul Foster
* Grant Taylor as Captain Paul Foster
* Wanda Ventham as Shaddock
This Italian dub was part of a series of dubs created for the Italian market, with several episodes receiving unique Italian titles.