Production began last week on the fifth season of the Los Angeles-set police drama \"Southland,\" TNT said Monday. Former guest star C. Thomas Howell has become a full-time cast member, alongside stars Michael Cudlitz, Shawn Hatosy, Regina King and Ben McKenzie. Dorian Missick, Emily Bergl and L. Scott Caldwell will return as recurring guest stars, and Chad Michael Murray is set to appear in a two-episode presentation, the cable network said. Season 5 of \"Southland\" is slated to premiere Feb. 13.