Michael Rennie was a British film, television and stage actor, who had leading roles in a number of Hollywood films, including his portrayal of the space visitor Klaatu in the science fiction film The Day the Earth Stood Still (1951). In a career spanning more than 30 years, Rennie appeared in more than 50 films and in several American television series.

The Big Blockade was a 1942 British black-and-white war propaganda film in the style of dramatised documentary. It was directed by Charles Frend and starred Will Hay, Leslie Banks, Michael Redgrave and John Mills. It was produced by Michael Balcon for Ealing Studios, in collaboration with the Ministry of Economic Warfare.