When I was little I had a phobia about clowns. I loved the circus, but when those creeps showed up I'd bury my face in my mother's arms. I didn't quite have the same reaction to this ep, but it came close. On my bottom 10 list, that's for sure. Seems to me the writers shot their wad with the Investigations arc; there followed a period of unprecedented (and fortunately, not repeated) lull.