Derek and his wife Mitsy are on the local radio to help promote their new self-help relationship book. They also have a drop-in day at their clinic. Unfortunately a tale about a past girlfriend 'Mara' hits a chord with Zara - for it is she, and he was already married. Very annoyed, she drags Simon in to expose and ruin him. Unfortunately Mitsy gets caught in the crossfire. Julia calls in a woman to help with the Mill's efficiency, which results in war between her, Julia and Karen.