Neil Morrissey, Debbie McGee, Ed Byrne, Heather Small, Kate Bottley, Raphael Rowe and JJ Chalmers arrive in Biarritz and make their way to the start of their pilgrimage.

The celebrities are delighted to find charity on their pilgrimage with a free-flowing wine fountain, but leave a hostel in solidarity with singer Heather when she senses racism.

The seven celebrities are walking the last 100km to Santiago. Priest Kate still dreads the walk, but non-believer Raph is enjoying the opportunity to appreciate his surroundings.

Eight well-known personalities, all with differing beliefs and faiths, put on backpacks and walking boots, and set out to cover the Italian section of the ancient 2,000km Via Francigena, which starts in Canterbury and finishes in Rome. They have only 15 days to tackle 1,000km, so they start their pilgrimage in the Alps, just before the Swiss-Italian border. Will this journey of a lifetime change the way they think about themselves and their beliefs?

Stephen K Amos tells the group that as a gay man he struggles to find any kind of religious home.

The celebrity pilgrims set off on the final challenging stretch of the Via toward Rome. When they receive an extraordinary invitation from the Vatican, emotions run high.

Seven celebrities of differing faiths and beliefs tackle the 2,200km Sultans Trail by road and on foot in a modern-day pilgrimage across Europe to the historic city of Istanbul.

Life on the Sultans Trail begins to challenge the celebrities as Adrian Chiles tells the group he is struggling with the purpose of pilgrimage in the face of their experiences.

The celebrities set off on the final leg of their pilgrimage and arrive in Turkey, where they head for the magnificent Suleymaniye Mosque in the historic city of Istanbul.

Seven celebrities of differing faiths and beliefs set out in search of St Columba, an Irish monk born 1,500 years ago who helped spread Christianity from Ireland to Scotland.

Life on the pilgrimage gets tough as the celebrities are challenged both physically and spiritually, struggling with lack of sleep and difficult questions about faith.

With the end of their pilgrimage looming, the celebrities get a taste of monastic life in a medieval abbey, but will it help them discover more about the pathway to faith?

Seven well-known personalities, with differing faiths and beliefs, meet in northern Portugal to tackle a modern Catholic pilgrimage: the famous sanctuary in the city of Fatima.

With under a week to go before they join tens of thousands of people in Fatima for the annual celebration of the Miracle of the Sun, the pilgrims decide to speed up their journey.

In Coimbra, there are visits to a convent, a mosque and a synagogue. Finally, after 14 days and 364 kilometres, the group finally reach the famous Sanctuary of Fatima.

Seven celebrities of differing faiths and beliefs experience an emotional journey on a pilgrimage in north Wales, a route linked by churches dedicated to early Celtic Christian saints.

The pilgrims head into Eryri National Park as the pilgrim path leads the group to one of Wales’ most famous natural wonders, Aber Falls.

The pilgrims' final destination is Bardsey Island, the fabled ‘Island of 20,000 Saints’. Along the way, they see spectacular landscapes, visit holy sites and engage in fasting, ritual and meditation.