Malcolm Mitchell is consultant with the Central Intelligence Agency and an electrical engineer.
He is the last remaining person out of three who can crack the black boxes.
In "Betrayals" Nikita kidnaps him before Division has the chance and asks him to help her in this. She took him to her lair. She asked him to help her crack the black box she got from Dana Winters.
In "Pandora" he and Ryan Fletcher decrypted the black box in front of CIA Director. After he accessed the operation Black Sparrow, a nerve gas came out of the black box. He left the room and he survived.