Submarine

You are part of the British foreign service, MI-6. A spy from your division has been undercover on a Soviet submarine, but has been detected by the submarine's crew! Your spy has been locked up behind bars in the submarine - however, he has managed to connect a sleeping gas to the ventilation system! This means that the crew will be unconscious for an hour. You have already completed the first part of the mission, and are now on board the submarine - do you have what it takes, to rescue your spy, before the crew wakes up? You have an hour to free your spy and escape - good luck!