Ed now looks thoroughly confused. "Okay, now I'm lost..."

Kat, meanwhile, tilts her head to one side, trying to figure out what April means. "It... might mean that Al's lost four years of memories," she says thoughtfully. "The same amount of time that's passed since he lost his body in the first place. That's as near as I can figure, anyway."

Ed's expression turns somewhat pained. "I hope not..."