Susan Calman explores the beautiful Trossachs and west of Scotland, a place filled with dramatic scenery and abundant with iconic glens, impressive castles and rare wildlife. Susan begins at the fairy-tale Castle of Inveraray, where she goes behind the scenes with His Grace, the Duke of Argyll, head of Clan Campbell, to reveal some amazing secrets that may not be for the faint hearted. At the picture-perfect Loch Katrine, the comedian gets exclusive access at a world-class feat of Scottish engineering and in Inverawe, discovers the secrets to Scotland's world-famous smoked salmon.

• Susan Calman