|Affiliation:||Counter Terrorist Unit|
|Profession:||Field agent, CTU Los Angeles|
|Died:||Day 6: 11:55am|
Shot by Graem Bauer's henchman
|Played by:||Steve Wastell|
|Episode:||"Day 6: 11:00am-12:00pm"|
Mark was a CTU field agent active during Day 6.
After Graem managed to take Jack and his father, Phillip Bauer into custody, Graem's henchman went outside and murdered Mark and his partner by shooting them through their vehicle window. When Graem, Irv, and the henchman took Jack and Phillip outside to their van in the parking lot, Phillip saw the bodies of the agents and expressed shock at what his son did.