Joanna becomes obsessed with finding out who Sally McGowan is. Michael is horrified by Joanna's behaviour and reveals he knows she scared a child in London. Undeterred, she believes a prison painting could expose the truth. Fired from work, she rushes to Kay's house and saves her from a gas leak. Joanna tips off Zac, but when he exposes Liz, Bea realises Joanna was the source.