Lauren Koslow (Kate, DAYS) makes an appearance on tonight's episode of CRIMINAL MINDS: SUSPECT BEHAVIOR. "It was fun to go out of the sandbox and play somewhere else," she raves. "Whenever you do something outside your regular line of work, it makes me nervous. It definitely was fun, though. It's a completely different kind of character from Kate; a straight-laced attorney who works for a hospital. She gets in some very hot water…" The show airs on CBS at 10 p.m.