Appearances. Roundtree appeared in the following three episodes as a recurring character. He joined the main cast since the start of season 12.

Who is Agent Roundtree?

Caleb Castille: Devin Roundtree, FBI Agent Devin Roundtree.

Who is the new agent in NCIS Los Angeles?

Casting. In February 2020, Medalion Rahimi, who plays NCIS Special Agent Fatima Namazi, was promoted to a series regular in the middle of the season.