Casey is not in it. Sadly, neither is Alex because the timeline doesn't work. It's set between two different SVU episodes. The one with the pregnant twelve year old girl and creepy magic drug dealer guy from Buffy as the cult leader and the one with the ending that made me throw things all "WTF, SVU, WTF?!" You know the one I mean? The one that DIDN'T END. Oh, oh my hate for that episode has fucking wings.