Archie is the audio/visual surveillance specialist.
In the 7th season episode "Lab Rats" he assists Hodges, along with the other lab techs, in trying to figure out who the Miniature Killer is. Archie is a fan of science fiction, and he surfs when he can get away from the lab (season 7, "Lab Rats"). At the beginning of season 8 he has also taken over the role of handwriting analysis. He says it is to expand his horizons, and his paycheck.
In the episode "Feeling the Heat", while assisting Warrick Brown in a case involving an apparent death by heat stroke, he remarks that he would prefer to die in his sleep by an aneurysm. In season 3 episode, "Random Acts of Violence", he assists in investigating a murder at a computer-based business and is shown to enjoy working out in the field for a change. He's also suggested to be a Star Trek expert and a fan of internet-based role-playing games. In the season 9 episode, "The Grave Shift", Raymond Langston noted that Archie had bought one of his books, much to Archie's discomfort. In the episode "Deep Fried and Minty Fresh", Archie compliments Raymond on the other's use of Mandarin Chinese, implying that Archie is of Chinese descent.