She played the most powerful drug trafficker in southern Spain in the popular telenovela “La Reina del Sur”… And now Kate del Castillo is preparing to return to the right side of the law.

The 38-year-old Mexican actress is set to guest star on CBS’ “CSI Miami” this Sunday, October 23. In the episode titled “Killer Regrets,” del Castillo will appear as Anita Torres—a Mexican police chief under the police protection from the mysterious assassin who killed her husband.

The role is a complete 180-degree turn for Castillo, who earlier this year starred as Teresa Mendoza in “La Reina del Sur,” which depicts the rise of a young Mexican woman who becomes the most powerful drug trafficker in southern Spain. The telenovela attracted 2.4 million viewers, making it the most viewed premiere for any telenovela on Telemundo. The final episode was the network’s highest rated broadcast in its 19-year history with nearly 4.2 million viewers.

Del Castillo’s “CSI: Miami” episode will air this coming Sunday at 10:00 pm ET.