World On Fire, Episode 4

In this riveting premiere, Harry has a second chance at saving Kasia from Warsaw. In Manchester, could Lois be set for happiness at last?

Harry struggles to adapt to the realities of desert combat. Lois still longs to leave home. In Paris, Henriette is in grave danger, and a mysterious stranger arrives at Robina's door.

Stan and Rajib make a hasty retreat across the desert. Marga reasserts her commitment to the Fuhrer. Meanwhile, David is in peril in the skies over France.

Kasia takes on her first assignment as an agent. Rajib's military values are tested, and he is torn between duty and ideal. Meanwhile, a familiar face comes to David's aid.

Tragedy strikes at the heart of Harry's unit as the siege drags on in Tobruk. In Manchester, Kasia is confronted by the further horror of war.

Harry returns to Manchester, but Kasia is determined to leave. In Europe, Marga and Henriette must each escape, while North Africa is brutal for Rajib.