Season three deals with the aftermath of the bloody gang war between Black Mask and Two Face, and the latter's death (the "Harvey Dent" personality took control and shot "Two Face" in the head). The jail term of Black Mask means there is a vacuum to fill, and from the deep criminal underbelly of Gotham, out steps The Penguin. Batman must deal with this villain and bring him to justice while simultaneously dealing with a rogue ex-employee of the Wayne Enterprises, who is obsessed with riddles.