Langly was born circa 1968/1969 and grew up on a farm in Saltville, Nebraska. He showed an aptitude for computers from an early age, which was frowned upon by his parents. In 1989 he met Melvin Frohike and John Fitzgerald Byers at a consumer electronics show in Baltimore, and subsequently they formed a group publishing The Lone Gunman Newsletter. He is possibly the most paranoid of the Gunmen, taping all incoming phone calls, including those from Mulder, and on one occasion refusing to take part in a teleconference with Mulder, stating that he did not want his image bounced off a satellite. He is also the most sarcastic member of the team, always ready to offer a barbed comment. Langly enjoyed playing Dungeons and Dragons before the formation of the group; his alias is "Lord Manhammer". He once hacked into Maryland’s MVA mainframe in order to secure a handicapped parking permit. He is the Lone Gunmen’s expert in computers, hacking and programming. "Lone Gunmen" tv series First appearance "E.B.E." Lone Gunmen Dean Haglund Langly wears thick black-rimmed glasses, heavy metal and punk T-shirts (favouring The Ramones in particular) and jeans. He has long, blond hair (which sometimes leads to him being mistaken for a girl) and bears a striking resemblance to Garth Algar from Wayne's World.

This character cannot stand people who are less than able at whatever it is they are doing. Checkout clerks who can't work a register, delivery people who drop things, movie concession people who are slow, workers at fast food restaurants who get drive through orders wrong. All of these cause the character to get irate and usually verbally angry. In order to remain calm and not make a spectacle of himself, the character must make an Ego Roll.