The Merthyr MermaidBBC One Wales Duration: 29 minutesFirst broadcast: Mon 14th Dec 2020, 19:30 on BBC One WalesLatest broadcast: Mon 6th May 2024, 18:00 on BBC One Wales HDAvailable for yearsWatch nowDocumentary following ice swimmer Cath Pendleton and her dream to swim a mile in the coldest continent on the planet - Antarctica.ContributorsProducer:Craig WithycombeGenresSportSportSwimming Source: BBC Online