Ianto finds it as he’s packing to move into his and Jack’s new flat, sorting out what to keep and what to throw away.
At the back of his nightstand drawer is a key with a silly troll keyring, and for a moment the sight of it takes his breath away. It’s the key to Lisa’s flat in London, the one she gave him less than a month before Canary Wharf, her way of asking him to move in. It’s a bittersweet find, useless now but heavy with memories. Smiling, he drops it in the box of things to keep.