We follow Iain on the 47 miles from Glasgow to the halfway point at Crianlarich. Accompanying him on day one of his adventure is his Small Faces screen brother, Stephen Duffy, who walks with him on the first 20 miles, starting in Milngavie. On reaching Loch Lomond, chef and restaurateur Guy Cowan and Takin’ Over the Asylum writer Donna Franceschild join Iain, and they share a posh packed lunch on the banks and perform a dramatic dog rescue. Iain also makes a disastrous attempt at kayaking before catching up with River City co-star Lesley Hart in Crianlarich.

Iain takes on the last 52 miles of the iconic trip joined by familiar faces along the way. A week into adventure, he and his River City co-star Lesley Hart start with an easy six-mile walk from Crianlarich to Tyndrum. On his journey, an astonished Iain enters the mist-swirling valley of Glencoe, while a rained-off climb sees him reunited with Small Faces actor Stephen Duffy. With some challenges, a relieved Iain makes it across the Devil's Staircase while he enjoys a day in the small town of Kinlochleven. Exhausted, he finally descends into Fort William before ascending to Scotland's ceiling by climbing Ben Nevis.

Iain Robertson embarks on a 215-mile coast-to-coast challenge of walking the Southern Upland Way, from Portpatrick on the west coast to Cockburnspath on the east coast.

Iain Robertson continues his coast-to-coast walk along the Southern Upland Way. He is joined by actor Howard Ward, chef Christine Burke, and heads to St Mary's Loch with friend Jasmine Main.

With 71 miles left of his journey along the Southern Upland Way, Iain Robertson is joined by photographer Elaine Livingston and River City co-star Grant Stott on the last leg of his 215-mile walk.

Iain begins a new 131-mile ramble as he heads north to tackle the Speyside Way. He treks to the wilderness with Colin McCredie and friend Barratt Robertson.

Having covered almost 50 miles of the Speyside Way, Iain Robertson is joined by River City co-star Sally Howitt for an exciting diversion on a steam train.

For the final third of his 131-mile Speyside Way trek, Iain Robertson is joined by musician Paul Anderson and actor Joanne Gallagher as they celebrate Scotland's landscape.

Actor Iain Robertson takes on the Hebridean Way, a 200-mile challenge which includes ten islands, six causeways and two ferries, as well as exciting diversions along the route

Heading towards the halfway point of his journey, Iain is joined by River City co-star Kari Corbett for a visit to the beautiful West Beach.

Iain climbs up through the mists on Clisham Hill, before taking the 44-mile boat trip west towards St Kilda.

On the last leg of his 200-mile adventure, Iain is joined by his friend Kevin McKidd and takes a detour to Callanish with actor Alex Norton.