In a conversation with MASTERPIECE, Rose Williams (Charlotte) and Rosie Graham (Alison) talked about how their characters are alike and different, and how in real life they became—and still are ...

Enter this season Charlotte’s spirited younger sister Alison Heywood, played by Rosie Graham, who is keen to get stuck in with all the romantic adventure that the seaside town has to offer.

Her sister Alison (Rosie Graham) has been throwing herself at the handsome Captain Carter (Maxim Ays) for weeks, totally unaware that a better man, Captain Fraser (Frank Blake), truly loves her.