Sandi Toksvig embarks on one of the world's grandest rail trips, along the French Riviera, playground of the rich and famous, starting with Marseille to Saint-Tropez.

Sandi Toksvig discovers a canine film prize in Cannes and makes scent in Grasse. Then it's cocktails in the Antibes bar where the writer F Scott Fitzgerald used to drink.

In La Belle Nice, Sandi Toksvig visits the poshest hotel imaginable. After tracing Queen Victoria's footsteps, she hangs out in the super opulent 'Cape of Billionaires'.

It's journey's end on the Côte d'Azur for Sandi Toksvig as she explores Monaco's luxury millionaire lifestyle of fast cars, superyachts and a world-famous casino.