Troy explains to Niamh that Sherman is his ex-boyfriend, while Dean confides in Leo that he thinks the people hassling Troy are guys Dean owed money to when he was in London. Dean decides to take matters into his own hands and sends Sherman a voicemail to leave Troy alone. Also tonight, Niamh is horrified to learn the identity of her mysterious stranger and Farrah clashes with Heather, who finds herself under more pressure from Ciaran.