BONNIE: “What’s ‘McBrae Radiation’?”

OMAR: “Clara?”

CLARA: “Don’t look at me! I’ve got no idea what it’s talking about, either!”

OMAR: “You knew about that radioactive-life thing in Jacqueline’s puzzle, earlier, though.”

CLARA: “Well, this has nothing to do with that, then. I’ve no idea what that means, or what the symbol is.”

BONNIE: “Maybe we should have gone to ‘security’ instead.”

> Knock on the door.