A prologue was added to the beginning of all the fourth-series episodes for the American broadcasts. This was to clarify some initial confusion audiences had regarding the characters and their mission. In the opener, a waiter holding a champagne bottle falls dead onto a human-sized chessboard, a dagger protruding from a target on his back. Steed and Mrs. Peel (dressed in her trademark leather catsuit) walk up to the body as the voice-over explains: "Extraordinary crimes against the people, and the state, have to be avenged by agents extraordinary. Two such people are John Steed, top professional, and his partner Emma Peel, talented amateur. Otherwise known as The Avengers". During this voice-over, Steed pours two drinks from the wine bottle and Mrs. Peel replaces her gun in her boot. They clink glasses and depart together as the screen fades to black and the opening titles begin.