In 2011, Walker played the leading role in the Lifetime police drama series "The Protector", which revolves around a single mother who struggles to balance her family and professional life as an LAPD homicide detective. The series was canceled after one season. In 2014, she played Chyler Leigh' lead character's mother in the short-lived NBC police procedural, "Taxi Brooklyn". She made her feature scripted film directing and writing debut with "Sex, Death and Bowling" starring Selma Blair. In 2015, she was cast in the recurring roles in the Netflix crime drama "Longmire", and USA Network thriller, "Colony".