| Alan Ladd | Philip Raven |
| Veronica Lake | Ellen Graham |
| Robert Preston | Det. Lt. Michael Crane |
| Laird Cregar | Willard Gates |
| Tully Marshall | Alvin Brewster |
| Mikhail Rasumny | Slukey |
| Marc Lawrence | Tommy (Gates' chauffeur) |
| Pamela Blake | Annie (hotel maid) |
| Harry Shannon | Steve Finnerty |
| Frank Ferguson | Albert Baker |
| Bernadene Hayes | Albert Baker's Secretary |
| James Farley | Night Watchman (uncredited) |
| Virita Campbell | Little Girl |
| Olin Howlin | Blair Fletcher |
| Roger Imhof | Sen. Burnett |
| Victor Kilian | Drew (Brewster's nurse) |
| Emmett Vogan | Sgt. Carlisle (uncredited) |
| Chester Clute | Rooming House Manager |
| Charles Arnt | Will Gates |
| Virginia Farmer | Maid in dress shop (uncredited) |
| Clem Bevans | Scissor Grinder |
| Harry Hayden | Man in restaurant (uncredited) |
| Yvonne De Carlo | Showgirl at Neptune Club (uncredited) |
A marked hit man flees with a nightclub singer and stops a fifth-column poison-gas plot.
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