The comedian heads to the Highlands, where she searches for Scotland's most secretive super star - the Loch Ness monster. She meets a man who has spent almost 30 years waiting for a sighting of Nessie, before having a go in a home-made submarine. From the depths of the loch, Susan then heads to the highest point in the UK - Ben Nevis - discovering why the area is famous for its strongmen. Later, she tracks down the secret spot from which Bonnie Prince Charlie started the doomed Jacobite uprising, before ending her latest leg observing and interacting with a colony of seals