They're ringing the door bell? That adds credence to his theory this is someone who knows him or a family member. He knew this possibility became greater when he was stationed on Komarr. Even in a dome full of as many people as there were, it was hard to escape that part of his past. Whether they intend to be friendly or not is another matter and he keeps his stunner in hand.

He takes a moment to approach the door, standing off to the side in case it's already been rigged with explosives. He is in Imperial Security after all and preparing for the worst was a key survival trait.

"I wasn't expecting any visitors," he says in an even tone. "Name?"