Not quite a western, not quite a historical drama, Under Strange Flags is a little bit of both, and a lot of former RKO Radio cowboy hero Tom Keene. The star is cast as Tom Kenyon, a roving adventurer in Mexico during the Revolution. Hoping to protect the silver mine owned by heroine Dolores De Vargas (Luana Walters), Tom receives unexpected assistance from none other than rebel leader Pancho Villa (Maurice Black).
| Actor | Role |
|---|---|
 Tom KeeneTom Kenyon | Tom Kenyon |
 Luana WaltersDolores de Vargas | Dolores de Vargas |
 Budd BusterTequila | Tequila |
 Maurice BlackGeneral Pancho Villa | General Pancho Villa |
 Paul SuttonGeneral Barranca | General Barranca |
 Roy D'ArcyCaptain Morales | Captain Morales |
| PPaul BarrettDenny de Vargas | Denny de Vargas |