Jocelyn's journey upriver tests friendships and throws lives into jeopardy. Maria and Temperance team up against Yeardley, while disaster looms for the Sharrows.

Cast: Ben Batt, Naomi Battrick, Max Beesley, Rachel Colwell, Claire Cox, Patsy Ferran, Jason Flemyng, Dean Lennox Kelly, Stuart Martin, Abiola Ogunbiyi, Kalani Queypo, Luke Roskell, Abubakar Salim, Ben Starr, Matt Stokoe