Rose and Debbie arrange for Nina to write an article about Katy's disappearance, and things take a disturbing turn when Emmet shares his theory about his sister's whereabouts. For the love of God, WHERE IS KATY?! It's about time this mystery was solved already. Elsewhere, Nicola is still driving Niamh mad, but you have to love these two in action all the same. They're real life besties too, so now.