In the NCIS: Los Angeles episode 'Hot Water', ATF Agent Duke Morgan arrives when the mole plants evidence which leads to the arrests of agents Callen, Sam, Granger and Deeks. It just so happens that all of the arrests happen the same day Under Secretary Duggan (Jackson Hurst) reappears for Hetty's resignation.
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ATF Agent Duke Morgan is portrayed by Corey Reynolds. He’s known for his roles on Masters of Sex (Louise’s husband James), Murder in the First (ADA Martin Reardon), and The Closer (David Gabriel), among others. Reynolds is also recognized for his roles in the films Selma (Rev. C.T. Vivian), Straight Outta Compton (Lonzo Williams), and The Terminal with Tom Hanks (Waylin). NCIS: Los Angeles airs Sundays at 8pm on CBS.Most INTERESTING FINDS on Amazon]