With Jada Pinkett's Fish Mooney no longer causing trouble in Gotham, the series is getting a couple of villainous new characters to take her place. James Frain (Tron: Legacy) and Jessica Lucas (Cloverfield) have joined the regular cast of Gotham's second season as the evil sibling duo of Theo and Tabitha Galavan. Tabitha will later become the villain, Tigress.

A new Gotham arrival, Galavan is the savior the city has been waiting for — he is sexy, heroic, and lovingly devoted to his sister Tabitha. But behind Galavan’s altruism is a centuries-old vendetta. Galavan and Tabitha (aka Tigress) will take chaos and violence to a new level in order to bleed Gotham. Their plan will lead to the creation of new villains… and the destruction of others.
As for the bullwhip-wielding Tabitha, she's basically her brother's polar opposite in terms of temperament...
Sexy, violent, and toting a bullwhip, she’s the opposite of her cold and calculating brother – deriving a sensual pleasure from the violence and mayhem she’s tasked with.
Gotham returns to Fox on September 21st. [Deadline]