His aides and army commanders strongly advise against travelling by train, but Churchill is adamant.

An especially secure carriage is attached to a train (The Casablanca Express) and a unit of American commando troops assigned to travel with him.

The train proceeds on its way, but a German agent, Otto von Tiblis, is amongst the passengers in disguise.

Back in Algiers, Allied intelligence learn of the attempted kidnap and Cooper volunteers for a dangerous mission.

They learn that the 'Churchill' they battled to protect was actually a decoy, and the real Churchill has travelled to Casablanca by plane.