To be fair, he's searching for the right words, the right way to frame up how he's still struggling to process everything that John had just told him. And sometimes simple is best, isn't it?

A small, but genuine sort of smile as he laughs a little. "It's.. ah. It's a lot to take in. Time travel." A look that's warm with fondness. "And you captain a time ship." Because of course she does. Sara is the leader of her own team of heroes.