Michael Chiklis Michael Chiklis

Michael Chiklis is back in law enforcement - and heading to Gotham.

The Shield alum will play GCPD Captain Nathaniel Barnes in Season 2 of Fox's Batman series, TVGuide.com has confirmed. A "law and order zealot" who enters the police force "like a tornado," Barnes shakes up the organization and racks up enemies on both sides of the law while doing so.

Though Barnes starts out as a mentor to Gordon (Benjamin McKenzie), the two will one day find themselves at odds. McKenzie and showrunner Bruno Heller have both indicated that Season 2 of the drama will focus heavily on villains.

TVLine first reported Chiklis' casting.

Gotham returns Monday, Sept. 21 at 8/7c on Fox.

VIDEO: Go behind the scenes on the set of Gotham!