In the aftermath of a riot, cops are being lured into ambush shootings by a rash of bogus 911 calls. Surprisingly Mackey and Captain Aceveda must work together to stop these attacks and solve the problems in The Grove, while Assistant Chief Gilroy tr... (more)ies to pit the two against each other to save his own job.

Cathy Cahlin Ryan, Cedric Pendleton, David Rees Snell, John Diehl, Lana Parrilla