The inspirational story of Mercedes Gleitze, the first British woman to swim the English Channel and her battle against both the cold waters of the Channel and the oppressive society of the 1920s England.
| Actor | Role |
|---|---|
 Kirsten CallaghanMercedes Gleitze | Mercedes Gleitze |
 John LockeHarold Best | Harold Best |
 Victoria SummerEdith Gade | Edith Gade |
 James WilbyMr. Havers | Mr. Havers |
 Douglas HodgeThe Newsreader | The Newsreader |
 Justin HaywardLeonard Clay | Leonard Clay |
 Michael CroninSteamship Captain | Steamship Captain |
 Sam BullenP.J. Templeton | P.J. Templeton |
 John TolputtSir Arthur Coleridge | Sir Arthur Coleridge |
| MMike SkinnerDr. H.W. Phillips | Dr. H.W. Phillips |
| MMatthew Wyn DaviesCorentin Charboneau | Corentin Charboneau |
| OOwen OldroydOffice Manager | Office Manager |
 Kenneth OmoleJazz Club Compare | Jazz Club Compare |
 James WingateOarsman | Oarsman |
| DDavid AitchisonSamuel Huntington | Samuel Huntington |