Jane Tennison is a probationary WPC in 1973 London, where she faces sexism while working her first murder case. Follow her early career, her relationship with her boss DI Len Bradfield, and her determination to prove herself in a male-dominated police force, as she will eventually achieve the rank of Detective Superintendent.

The Battle of Passchendaele, 1917. For three years the great war has been waging, and the two armies find themselves entrenched along the four-hundred-mile Western Front. At the start of a pivotal allied offensive to break the stalemate, the nine-man crew of a British MKIV Tank set out to destroy a series of heavily defended German bunkers.

A young pilot, fresh out of training, is called to join a Flight while they wait for the call to scramble. Throughout a single day, he witnesses the skies of southern England filled with deadly dog fights, and after every exhausting battle the men return to their dispersal hut, only to find another of their number missing. Unwilling to surrender, the pilot and his comrades unite to take to the skies once more, determined to defend not only the airfield, but their entire country.