Rocketing into the new millennium in the eight years since season three, Happy Valley has rapidly expanded its footprint on Mars by turning former foes into partners. Now 2003, the…

Frank, Ray and Ani weigh their options as Caspere’s killer and the scope of corruption is revealed.

Desperate to locate a missing woman with intel about Caspere, Frank meets with Mexican drug dealers; Ani infiltrates an exclusive inner circle, with Ray and Paul keeping close tabs.

Ray and Frank contemplate new life choices. Ani and Paul follow a lead up the coast.

Ben Caspar’s autopsy reveals the gruesome details of his demise, and Ray and Ani wonder if it has anything to do with his fondness for prostitutes. Meanwhile, Frank looks into…