The Secret Service

May-Day, May-Day! (1x12)

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The Bishop assigns Father Unwin to protect the King of Muldovia during his visit to London, joining his retinue for a flight to New York where the King plans to visit his son. An attempt on the King's life is foiled by Matthew, but the Prince of Muldovia has hidden a bomb aboard the King's private plane and rigged a device that incapacitates the pilot and co-pilot.