Max Martini portrays Master Sergeant Mack Gerhardt on the CBS television series The Unit. Gerhardt is a former Army Ranger and a senior Unit operator. He holds the rank of Master Sergeant (E-8). His wife, Tiffy, and he have two daughters. Gerhardt worked with Jonas Blane and his team on the recovery of a radioactive component of a Chinese satellite, rescuing the drug minister of Mexico, the assassination of a terrorist financier in Spain, the bugging of an Iranian official's car at their embassy in Beirut, the recovery of seven Stinger missiles from Brazilian arms dealers, and the apprehension of a Serbian war criminal in The Balkans.