He jets down to Durham to assist in the case, whether he's wanted or not. He's keeping the other victims alive somewhere, for some other purpose. She's seen the other victims, kept like animals in a network of underground caves. Cross and Kate set out to track Casanova down. They follow him across the country to the West Coast, where they slowly, almost teasingly, unravel the rest of the story.
Freeman is still the best player in the game, folks, no doubt about it.
He has the uncanny ability to command focus onscreen even when he is a supporting character in a scene. Just check a few scenes from Driving Miss Daisy and The Shawshank Redemption to confirm the notion. I think the magic of Morgan comes from his ability to react as well as act. His voice speaks from some inner wisdom, and his eyes put check marks beside every question. He's at his best when he doesn't speak at all, instead letting his eyes, face, hands, and body explain the emotion.