The return of the major series tracking the development of the First World War, presented by Dan Snow. After 40 episodes looking at the war through interviews in the sound archives of the IWM and the BBC with those who experienced it, this week's five programmes explore the beginning of the end: the first months of 1918.

The year didn't begin well for the British. After a few months of relative quiet over the winter, British soldiers experienced the massive onslaught of the first German Spring Offensive in March 1918. In the first programme, in interviews recorded by the BBC in 1964 and the Imperial War Museums in the 1980s, men recall their devastating experiences of shelling, retreat, serious injury and imprisonment in the wastelands of the Somme during Operation Michael.

Programme 2 captures airmen's recollections of the loss of the last of the great flying aces at this point in the war. In April 1918 the Red Baron, Manfred von Richthofen, was shot down, and there's a tone of respect, of fair play even, which runs through the British officers' testimonies. The third programme looks at the state of British morale at this point in the war, and it's on issues like this that oral history reveals quite a different picture to contemporary accounts. The men talk openly and honestly about how they felt about their reluctance to serve as new drafts, or to return to the front if they'd been wounded: they now knew what they were up against. Programme 4 explores the impact of Spanish Flu through the recollections of both soldiers and the nurses that tended to them, and in the final programme, 'Enter America', Dan looks at the varied reactions to the long-awaited arrival of US troops in large numbers in the summer - from the French women throwing flowers at the men on parade, to the war-weary and unimpressed British soldiers. For German soldiers who talked to the BBC in 1964, it could mean only one thing: the end was coming.

An omnibus edition of five episodes of Voices of the First World War, spanning the course of the war from 1914 to 1917.

Narrated by Dan Snow, this edition begins with the Christmas Truce of 1914, when German and British troops mingled and played football in No Man's Land on the Western Front. Veterans recall the war as they remember it - from how they survived the nights in the trenches, to what they got up to behind the lines. Conscientious objectors and family members speak about their experiences from 1916 onwards. And William Towers describes his medical treatment and journey home after being injured at Passchendaele in 1917.

There are now no living veterans of WW1, but it is still possible to go back to the First World War through the memories of those who actually took part. In a unique partnership between the Imperial War Museums and the BBC, two sound archive collections featuring survivors of the war are brought together for the first time. The Imperial War Museums' holdings include a major oral history resource of remarkable recordings made in the 1980s and early 1990s with the remaining survivors of the conflict. The interviews were done not for immediate use or broadcast, but because it was felt that this diminishing resource that could never be replenished, and would be of unique value in the future. Among the BBC's extensive collection of archive featuring first hand recollections of the conflict a century ago, are the interviews recorded for the 1964 TV series 'The Great War', which vividly bring to life the human experience of those fighting and living through the war.

Voices of the First World War is broadcast in short seasons throughout the commemorative period.

William Towers describes his experiences as a seriously wounded soldier in the autumn of 1917, when his life was threatened as much by the primitive medical practices of the Western Front, as by the shrapnel that hit him. From his injury, to his treatment in an underground hospital and at the Etaples military camp, to his eventual recovery after evacuation to Britain, Towers speaks movingly of the role of resilience, love and luck in his journey back home, and back to health.

Members of the Tank Corps describe the excitement and rapid gains of the first day of the Battle of Cambrai, where new tactics and new technology helped the British to achieve that most elusive of advantages: surprise. After the mud-choked misery of Passchendaele, Cambrai was the first sign that an end to the stalemate of trench warfare was possible, and proved that the British could break through the strongest of defences - the German Hindenburg line. With Dan Snow.

Among the recordings made for the BBC's landmark series 'The Great War' in the early 1960s, one in particular stands out. John Palmer, a British Gunner who served as a signaller from 1914 onwards on the Western Front, admitted to being at his lowest ebb by November 1917. Towards the end of his time in Flanders fields, he admitted considering a self-inflicted wound to get out of Passchendaele, and the apocalyptic landscape he was crawling around in night after night. Finally, on his last night in the front line, sheer exhaustion left him unable to react as he heard a shell coming towards him. According to the historian Peter Hart, who recorded many of the interviews with First World War veterans for the Imperial War Museums' collection, John Palmer is the voice of the British soldier of 1917: suffering, drained, and almost broken.

Dan Snow, surveying the landscape around Ypres, hears the recollections of veterans of the Third Battle of Ypres, and maps their painfully slow progress eastwards. As the front line crept towards the ruins of the village of Passchendaele, the men renamed the few landmarks around them to reflect their experience of the place - from Hellfire Corner to Vicious Crossroads. As they advanced, in a series of local battles, the men were afforded little or no shelter, apart from abandoned German concrete pillboxes.

The return of the major series tracking the development of the First World War through the sound archives of the Imperial War Museums and the BBC.

The name Ypres has become shorthand for the most hellish conditions imaginable. In this week's programmes, looking at the events of autumn 1917 through interviews with those who experienced it, we come to the war's darkest days.

As they inched their way towards Passchendaele from July to November 1917, men witnessed scenes that would stay vividly with them for the rest of their lives. As Norman Macmillan, officer of the Royal Flying Corps, surveying the Battle of Passchendaele from the sky, said of it: 'Never at any time had I passed through such an extraordinary experience... Real damnation on the ground. And as we came out of it I felt that we had escaped from one of the most evil things I had ever seen at any time during that war'.

Dan Snow, based on location in Ypres and listening to the accounts of those who survived the place a century ago, attempts to grasp the unimaginable horror and dangerously low morale that marked this period of the war on the Western Front.

The first programme surveys the terrible conditions of the battlefield around Ypres in the autumn of 1917 - among the worst experienced by any army at any time in history. In the second programme Dan maps the painfully slow progress of the British towards Passchendaele between July and November in a series of battles, and how the men were afforded little or no shelter as they inched forward. In programme 3 we hear one man's account of the Battle of Passchendaele. In an extraordinarily honest interview with the BBC recorded almost 50 years later, John Palmer, suffering complete exhaustion after three years on the Western Front, describes the almost suicidal despair that took hold of him one night towards the end of his time on Flanders fields. The relative excitement and rapid gains of the early stages of the Battle of Cambrai are described from the point of view of members of the Tank Corps in programme 4, and in the final programme we hear the remarkable story of William Towers, who was seriously injured at Passchendaele. His life threatened as much by the primitive medical practices of 1917 as by the shrapnel that hit him, Towers speaks movingly of the role of courage, love and luck in his journey back to Britain, and back to health.

In the first five programmes looking at 1917, Dan Snow explores the events of the year through the recollections of those who were there. As the fighting became more and more desperate, in the air, on the Western Front - even below ground in extensive mining operations - the morale of those being sent into battle was at times becoming dangerously low.

Morale was never worse in the Royal Flying Corps than in spring 1917, which became known as 'Bloody April'. Germany had the upper hand at this point of the war in the air, with superior tactics, training, and technology. Crisis enveloped the French Army from May onwards, as mutiny took hold among their long-suffering troops. Dan also looks at the extraordinary feats of military engineering - and deadly human cost - involved in exploding 20 huge mines at the Messines Ridge. Soldiers and officers speak about the issue of rank and class in the British Army of 1917, by which time many of the ex-public school officers had been wiped out. And there are conflicting versions of events when it comes to the British mutiny at Etaples in September, but Officer Jim Davies, at the centre of the action on the bridge between the army camp and the town, tells his story.

Voices of the First World War is made in partnership between the BBC and the Imperial War Museums.

There are conflicting versions of events when it comes to the British mutiny at Etaples in September 1917, from the soldiers who took part in it, to the military policeman who witnessed it. They tell their stories, along with Officer Jim Davies, who was ordered to help put the mutiny down, at the centre of the action on the bridge between the army camp and the town. With Dan Snow and Peter Hart.

Soldiers and officers speak about the issue of rank and class in the British Army of 1917, by which time many ex-public school officers had been wiped out. With Dan Snow.