Chinese Prize (S09E04)

A talented team of Chinese operatives lands in London for just two days, prompting the crew to uncover their purpose. Ruth goes incognito at a prominent scientific research firm, where one scientist, Jiang, becomes the key target. Meanwhile, Beth enlists a contact from the Chinese Security Services to serve as Section D's inside informant, but has she rushed into this move? Lucas faces a choice that could alter the trajectory of his life permanently.