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With his fingerprints on the gun that killed Zoe, Luther is a prime suspect and goes on the run. Only his sergeant, Justin Ripley, believes he is innocent. Luther hides out with Alice who, along with the loyal Justin, helps him to steal and get rid of the tell-tale gun. Justin is also suspended after shouting a warning to Luther when Reed meets him one-to-one but hopes to provoke him into action so that a sniper, positioned on the roof, will shoot him. Luther and Alice also persuade Mark of his innocence and send him to the police station where he takes the diamonds - Reed's cut from the Carrodus robbery - from Reed's locker. Reed pursues Mark, straight into the trap Alice and Luther have set for him at the deserted Waterloo train station, culminating in a sort of revenge.