In 2013, Robertson was cast as a lead in the TNT detective drama series "Murder in the First" co-created by Steven Bochco which debuted on June 9, 2014. She plays the role of Hildy Mulligan, a homicide detective and single mother. In the same year she starred in the thriller film "The Vatican Tapes" that was released on February 27, 2015, and was cast in recurring role as Jodi Morgan for the second season of A&E drama series "Bates Motel". In 2015, Robertson had the leading role alongside Eric Dane in the four-hour miniseries "The Fixer".