The story of Captain Matthew Webb, the first-ever person to successfully swim the English Channel in 1875 equipped only with his moustache, doses of Brandy and a wire wool swimsuit.
Costume
That wool swimsuit deserves its own supporting actor credit.
Practical Effects
Actual cold water shoots; Warren Brown's shivering is method acting reality.

Director
Justin Hardy
Trivia, insights & behind the scenes
The real Webb's actual wool swimsuit is preserved in a Dover museum, smelling presumably of failure and brandy.
Webb's 1875 crossing made him a global celebrity, but 'Captain Webb' (2015) arrived when nobody asked for Victorian swimming biopics.