Charlotte arrive back at the Regency era seaside resort—fiancé in tow—for the society event of the year. Seeing Colbourne again leaves her feeling uncertain. Meanwhile, Georgiana receives a shocking threat to her fortune, and Edward tries to prove to Lady Denham that he is a changed man.

Cast: Rose Williams, Ben Lloyd-Hughes, Crystal Clarke, Anne Reid, Kris Marshall, Jack Fox, Sophie Winkleman, Liam Garrigan, Eloise Webb