Southland - Season 4 - Eps 2: Underwater
Things are gonna change with Joel Rucker as the new captain. Lydia and Ruben investigate a convenience store murder, and Lydia uses her typical compassionate charm to collect facts on her suspect from an unassuming grandmother. Meanwhile, John and Jessica get to test their physical abilities when they're attacked on the street. Elsewhere, Sammy and Ben ride with a mistake-prone officer, but Ben is the one making mistakes... mistakes that earn him some notoriety.
About Southland

Title: Southland
First Air Date: 2009-04-09
Last Air Date: 2013-04-17
Status: Ended
Rating: 7.9/10 (from 182 votes)
Language: EN
Seasons: 6
Total Episodes: 43
Network: NBC TNT
Genres: Drama
Production Companies: Unknown
Synopsis
A raw and authentic look into the Los Angeles crime scene, going far inside the lives of cops, criminals, victims and their families. The show centers on four main characters: Officer John Cooper, a seasoned cop who will have to prove himself again after recovering from surgery; Officer Ben Sherman, who still has much to learn after recently completing his training rotation; Detective Lydia Adams, whose unending caseload hits closer to home; and Sammy Bryant, a former detective who decided to go back to being a uniform cop after the traumatic death of his partner.
Cast

Ben McKenzie
Ben Sherman

Michael Cudlitz
Officer John Cooper

Regina King
Detective Lydia Adams

Shawn Hatosy
Officer Sammy Bryant

C. Thomas Howell
Officer Dewey Dudek