No exclamation, nothing that would alert him specifically, but Owen could hear a soft muttering coming from...somewhere. He couldn't pinpoint where in the house it was coming from, though, so Owen continued to wander blindingly, checking every room that he came to until he finally found Ianto back in the far corner of the sitting room. Pausing at the door to the room, Owen peered over at him Ianto before slowly starting forward, a hesitance in his step until he reached Ianto's side.
"Yan?" Owen asked, kneeling down next to Ianto, reaching out to rest a hand on his arm. "Ianto, look at me. Please. I need to make sure you're not hurt."