cannot bring himself to do so, mindful of his own adultery with Crystal, as well as a threesome he had with a pair of Russian prostitutes while on foreign assignment. Eventually Mack and Tiffy reconcile after he confesses his own affairs to her. Kim Brown suggests that the reason Tiffy loves Mack so deeply is that she had an abusive upbringing and is therefore attracted to violent men. In her husband she found a violent man who could control his impulses by channeling them into his work. Over the course of the series Mack kills at least 35 people. According to the writers in the provisional storyline for the planned fifth season, Mack would take over command of the team after Jonas succumbs to combat stress. However, when Tiffy becomes pregnant with their third child he would apply to become an officer and at the end of the season he would leave the Unit for a non-combat training post in order to better provide for his family. According to executive producer Shawn Ryan Awards and decorations The following are the medals and service awards fictionally worn by Master Sergeant Gerhardt. Tiffy Gerhardt Tiffany "Tiffy" Gerhardt is (portrayed by Abby Brammell) is the wife of Mack Gerhardt. She and her husband have two daughters, Lissy and Jenn. Mack and Tiffy have a very strained relationship; Mack's quick temper causes violent and abusive outbursts, while Tiffy is a serial philanderer, most notably in an affair with the Unit's commander, Colonel Tom Ryan. When first Kim, then Lissy, discovers Tiffy's infidelity, Tiffy's life begins to unravel: although she ended the affair before either of them learned of it, Mack eventually discovers a photograph of Tiffy with Colonel Ryan. After Tiffy's tearful confession and threats of suicide, Mack has to be physically restrained from killing the Colonel. Knowing that she has jeopardized her marriage, Tiffy files for divorce and takes a job as an exotic dancer to pay the bills, although she and Mack slowly resolve their differences. Eventually, Tiffy and Mack salvage their marriage, but not before an accident in their garage (unrelated to their marital problems), forces Colonel Ryan to move Mack into the BEQ (Bachelor Enlisted Quarters), with orders that he is not to return to the Gerhardt home unless under escort by base personnel. Charles Grey Sergeant First Class Charles Lewis Grey (United States Army, call sign Betty Blue) (portrayed