Mickey Bliss is in London, taking time out from signals training at Aldershot.
British surgeon Celestine de Tullio has found enough new purpose in war.
Ahmadullah is posted from the western front to join the start of the Gallipoli campaign.
A day of rest behind the lines is not easy for Mickey Bliss and his Signals colleagues.
Mickey Bliss tries to work out why the enemy are always one step ahead.
Mickey finds himself at Ypres with the exhausted British Expeditionary Force.
Dr Celestine de Tullio returns from France to find that things are amiss.
The first Indian Army soldiers arrive on the battlefields of France.
Mickey's plan to be a battlefield tourist is undone by an artillery captain on a mission.
Wounded in action, Walter Oddy is among thousands arriving at the hospitals in Boulogne.
The German advance is being held north east of Paris, on the day Mickey arrives at war.
A real day at war, exactly 100 years ago, based on eye-witness accounts.
Tommies' creator Jonathan Ruffle talks about the research behind the series.
By Avin Shah. It's Armistice Day, we're in frozen, northern Russia and still fighting.
The story of the YMCA's Mrs Addie Washington, sent to support US black soldiers in France.
Two armoured trains meet on a single track in the desert.
By Jonathan Ruffle. Mickey's bold deception plan is put into action.
By Neil Brand. Mickey's big deception plan could change the course of the war.
The British Army is in pell-mell retreat, and must face up to losing the war.
Celestine's mission to isolate the causes of trench fever is interrupted by a visitor.
In the face of a German advance, the Women's Army Auxiliary Corps decide whether to stay.
Caught up in the surprise British retreat of 1918, signallers face a terrifying choice.
In 1917, the conflict in the First World War redrew the Middle East.
Mickey deals with the problem of remotely controlled German boats packed with explosives.
After the victory at Messines, Belgium, are the Allies prepared for Ypres?
Can Pavan and Bill buy the safety of those besieged in Mkalama Fort by German troops?
Night falls on a race to the Macedonian front.
Who appears at your bedside when you are a serviceman who is expected to die?
In the tunnels underneath Vimy Ridge, the Canadian Corps are re-writing the rules of war.