Ends 12/31/14. 'Episode 06.' Season Finale. A deadly game of Russian roulette ends with Porter and Baxter blasting their way into the desert, with Sharq's men in pursuit. In London, Collinson works to extricate the pair. Meanwhile, the last surviving victim in Porter's ill-fated 2003 Iraq rescue dies, leaving Thompson with ballistic evidence that could finally ID his shooter.