Season 4 features a major turning point with the departure of its most popular cast member, Patricia. When Rowena Wallace chose to leave, the producers attempted to replace Patricia with several strong female antagonists in the form of Karen Fox, Leigh Palmer (Lisa Crittenden) and Caroline Morrell (Abigail) but none of these proved as successful, leading the producers to bring the character of Patricia back, albeit played by former "The Box" star Belinda Giblin, having undergone plastic surgery in Rio de Janeiro and now calling herself Alison Carr.