The duo of writer Paul Dini and artist Guillem March allow the Joker's former assistant Harley Quinn to take center stage as the girls deal with the aftershocks of Hush's deadly manipulations. But, more importantly, who's the surprise guest star? Well, you're in luck. Not only do we have a few pages for you to scan below, but GOTHAM CITY SIRENS #5 hits comic stores today. Easy, right?