is arrested for tax evasion and heads to prison willingly to "heal" from his trauma, leaving Barbara Gordon in charge of the Bat-signal.

joins the Bat-Family (Batgirl, Nightwing, and Robin) to protect Gotham.

Season 3 Finale: Is Harley Quinn Gotham’s Newest Hero? The Season 3 finale of Harley Quinn , titled officially flipped the script on the DC status quo. After three seasons of mayhem, the show delivers a conclusion that manages to be both emotionally mature and characteristically absurd. The Big Shift: Harley Joins the Bat-Family