A Scotland Yard undercover detective is on the trail of a saboteur who is part of a plot to set off a bomb in London. But when the detective's cover is blown, the plot begins to unravel.
Directed byAlfred Hitchcock
Written byJoseph Conrad, Charles Bennett, Ian Hay
CountryUnited Kingdom
Runtime77 min
On screen
Sylvia Sidney
Oscar Homolka
Desmond Tester