Tonton Streaming Monarch of the Glen (2000) S1E5 - Episode 5

Archie's wayward sister Lizzie turns up with her New Age boyfriend Gerald and it seems the pair have big plans to turn Glenbogle into a kind of hippy retreat. Archie and Gerald end up at loggerheads, however, when some of their New Age ideals seem to involve Hector rediscovering his lost youth and taking an ill advised swim in the lake.