The Castaways sees Sheridan Smith and Céline Buckens as two sisters whose holiday of a lifetime ends in disaster.
Based on the bestselling novel by Lucy Clarke it follows Lori and Erin who travel to Fiji together but have a huge fight. As a result, Erin doesn’t board the short local flight to their tropical resort but then later discovers the plane, with Lori on board, never arrived at its destination.
