Warn London

Warn London is a 1934 British thriller film directed by T. Hayes Hunter and starring Edmund Gwenn, John Loder and Leonora Corbett. It was based on a novel by Denison Clift.

Premise
A detective goes undercover to infiltrate a gang planning a bullion robbery.

Cast

 * Edmund Gwenn - Doctor Herman Krauss
 * John Loder - Inspector Yorke / Barraclough
 * Leonora Corbett - Jill
 * D. A. Clarke-Smith - Doctor Nicoletti
 * Garry Marsh - Van Der Meer
 * John Turnbull - Inspector Frayne
 * Douglas Stewart - Davis
 * Raymond Lovell - Prefect