Qubit squints, puzzled. They're locked out? How? He knows Carlisle still has a manor key, he's seen it - that's how he modeled the lock to fit. (It had felt like a nice touch.)

"Your house key ought to - you don't have it?" Why wouldn't he-? Suddenly it hits him, and he feels like a moron for not thinking of it sooner. Why would he have brought it? He had no reason to, he hadn't expected a full-scale working replica of his own house! Qubit smacks his palm against his forehead. "I'm sorry. Oversight. Let me render in a copy-"

With a one-handed gesture, he summons a holo-keyboard and types in a line of code; then the keyboard vanishes, and Qubit holds out his hand just in time for the replica key to drop into it, seemingly out of thin air. To all appearances, it's identical to the original. He walks briskly up the steps to offer it to Carlisle, handle first.

"Here. If you'd like to do the honors," he says. (Granted, he could have just unlocked the door with the flip of a bit, but it feels important that Carlisle be the one to do it.)