Jack O’Connell plays the gang’s leader, Jimmy Crystal, a psychopath with wavy blond tresses and rotten teeth, his inching-toward-middle-age bod girdled by a purple velour tracksuit adorned with gold chains. Jimmy’s crew of knife-toting teenage followers wear matching towheaded wigs over their shaven pates. Together, they roam the countryside, terrorizing the locals almost as much as the infected do. They put Spike to a test—he must kill one of the other members in order to join the group, and though he squeaks by on a technicality, he manages to do so. Thus he becomes one of Jimmy’s “seven fingers,” all named Jimmy and all bound to follow this charismatic maniac’s orders, which are ostensibly divined from Satan, though they clearly originate in his own cracked noggin. Spike, brave but sensitive, is miserable as a Jimmy, but he has no choice. Only one fellow Jimmy, Jimmy Ink (Erin Kellyman), seems clued in to Jimmy Crystal’s insanity, and only she connects with Spike's suffering.