Sgt. Thomas "Mac" McAllister

Sergeant Thomas "Mac" McAllister is soldier in the British Army who had a promising career until he assaulted a senior officer. The only survivor of a disastrous mission to render the terrorist Omair Idrisi, he was due to be court-martialed until the revived Section 20 reassigned him. He is initially partnered with Wyatt, whom he initially finds to be irritating, but the two gradually develop camaraderie.