Southland's fourth season finale is going to put some of the show's new partnerships to the ultimate test.Lucy Liu ) readies herself to move on to a new precinct as a newly minted sergeant, Cooper (Michael Cudlitz) isn't exactly ready to let her go with a handshake and a smile. That anger stems from the fact that Tang lied about tampering with a crime scene after she shot a teenager who pointed a toy gun at her."Her integrity is completely f---ing shot with [Cooper],"Cudlitz tells TVGuide.com. "She made this choice, and now John is wrestling with the fact that it's a mistake. ... He feels that what she has done you cannot come back from. She has crossed the line with no excuse."
Tang, however, won't heed any of Cooper's warnings, particularly since she knows of his own questionable past as a cop who stayed on the streets despite a debilitating painkiller addiction.Ben McKenzie) will find himself set adrift by a recent accident that threatened the life of his partner Sammy (Shawn Hatosy). In the season's penultimate episode, a pimp Ben had beaten up opened fire on Ben and Sammy's police car. Although they escaped without being shot, their police cruiser was then broadsided, leaving Sammy bloody and unconscious.McKenzie says these recent developments will lead his character to even darker territory. "I would say the guilt and frustration and the feeling of 'nothing's going to get better unless extreme action is taken' sort of has a cumulative effect," McKenzie says. "It tips Ben over into another place. ... You are certainly left to believe that he has made a pretty serious decision that is pretty far outside the bounds of what he ought to do morally, legally, ethically. It's pretty severe. It is a far, far cry from where we started.