Claire races to discover the source of an epidemic aboard a disease-stricken ship before hundreds of sailors die. And as Jamie locks horns with Captain Raines, Fergus finds himself torn between loyalty and love.
- Caitriona Balfe as Claire Randall Fraser
- Sam Heughan as Jamie Fraser
- Lauren Lyle as Marsali MacKimmie
- César Domboy as Fergus
- Richard Dillane as Captain Raines