Assignment II: The Railway Station (7) (S02E07)

Sapphire and Steel awaken to discover that they’ve been thrust twelve days into the future. In that period, the darkness has vanished along with all the ghosts. A terrified Tully attempts to persuade Sapphire and Steel that he must leave the station for personal reasons, but they suspect his true motivation is a failed pact with the darkness. Given the circumstances, Sapphire hesitantly consents to reach out to the darkness, allowing Steel the chance to negotiate his own arrangement with their foe.