"Interdimensional threats usually are." Clark replies with a shrug of his own. "So. When do we start?"

He turns back to Harley: "It's a nice change of pace, isn't it?" He does mean that. Despite her usual company, Harley's never struck him as a bad person. Just misguided. Maybe coming here's going to give he the chance she needs to make a change for the better in her life.

"Brainiac 5?" He asked, raising an eyebrow. It definitely sounds like him at least.