Richardson's arrival at the Fishbowl catches Henry off guard; Martian scrambles to unravel Cossack's game as the stakes escalate; Naomi, uncovering a secret, cautions Danny; Sami's attempts to reach Martian lead to naught and Osman plays his hand.
Martian is a covert CIA agent ordered to abandon his undercover life and return to London Station. When the love he left behind reappears, romance reignites. His career, his real identity and his mission are pitted against his heart; hurling them both into a deadly game of international intrigue and espionage.