Michael Portillo mounts a valiant defence against fierce latter-day Roman gladiators in Pula's amphitheatre as he begins a journey across the Balkan countries of Croatia and Bosnia and Herzegovina.

Ably assisted by Lila, an expert labrador, Michael Portillo hunts for truffles in the Istrian countryside near the hilltop town of Buzet.

Michael Portillo’s railway adventure reaches the Dalmatian coastal city of Zadar, once an important Venetian trading hub and still a centre for the production of Maraschino cherry liqueur.

In Sarajevo, capital of Bosnia, Michael Portillo traces the fateful last journey in 1914 of the Archduke Franz Ferdinand and his wife, Sophie.

Michael Portillo enjoys a journey on the historic line from Sarajevo to Mostar, descending 600 metres through the Dinaric Alps, reflecting on the divisions which tour apart the old Yugoslavia.

Michael Portillo embarks on a Scandinavian railway adventure from the Norwegian port of Bergen to the Danish capital, Copenhagen.

Michael Portillo’s rail journey continues on the Bergen Line, heading towards the Norwegian capital of Oslo, with its fine modernist architecture and 19th-century parliament building.

Michael’s saga resumes in Larvik on Norway’s southern coast, where he investigates the city’s prized natural resource, a distinctive blue rock named larvikite.

Michael Portillo’s Scandinavian rail adventure reaches Denmark’s second city, Aarhus, an architectural playground with dazzling contemporary buildings set alongside historic half-timbered houses.

Michael Portillo concludes his epic rail journey across Norway and Denmark, crossing an 18-kilometre box girder bridge between the islands of Funen and Zealand, known as the Great Belt Bridge.

Michael Portillo is transported 150 years back in time to the tiny Alpine village home of Switzerland’s most famous child, Heidi, and heads to the Rhine Gorge, also known as the Swiss Grand Canyon.

Michael Portillo ventures into the bowels of an immense hydroelectric dam to learn how the Swiss use their mountainous environment to power the country.

In Zurich, Michael has a brush with the absurd in the anarchic paintings of the Dadaists and visits the Grossmunster Church to learn about the rebellious pastor at the centre of the Swiss Reformation.

Michael Portillo scales the Swiss Alps on one of the the steepest cog railways in the world and visits the 19th-century fairy-tale Grand Hotel Giessbach.

Aboard the Golden Pass Express, Michael Portillo wends his way in style down steep mountainsides from Interlaken to the Swiss Riviera. In Lausanne, he contends with a knife-wielding robotic arm.

Michael Portillo’s rail travels take him to the north west corner of France, where he explores the beautiful regions of Brittany and Normandy and learns of their connections with Great Britain.

Michael Portillo’s railway journey reaches the naval port of Brest, home to France’s oceanographic fleet. He also learns how to make a sweet, buttery Breton cake called kouign-amann.

Michael Portillo’s railway adventure reaches Rennes, capital of Brittany. At the Lycee Emile Zola, he hears how the school was used as a military court for the second trial of Alfred Dreyfus.

In Bayeux, Michael Portillo admires the Bayeux Tapestry, the 70-metre-long work of art commissioned to record William the Conqueror's conquest of England and the Battle of Hastings in 1066.

In the apple orchards of the Calvados region, Michael Portillo discovers how the classic digestif has been distilled since 1865 at the Pierre Huet estate.