There are very few fish in Scotland that are not native to this country. Certainly the most famous of our foreigners is the Rainbow Trout. In this programme, presenter Paul Young goes fishing in a typical "put and take" fishery in Lanark, where the Rainbows can exceed 10lbs or more. He travels the Lowlands and to the far north of Scotland, where the Rainbow Trout seem to have a liking for a song or two. As the trout season comes to a close, Paul enjoys a light hearted angling contest on Loch Fitty, to see if technique can match enthusiasm.