Extraordinary crimes against the people and the state have to be avenged by agents extraordinary'. '.strtoupper('t')wo such people are john steed patrick macnee, top professional, and his partner, emma peel diana rigg, talented amateur'. '.strtoupper('o')therwise known as, the avengers'. '.strtoupper('t')his boxset includes the complete and uncut series 4, on blu ray™ for the first time with a wealth of special features.bonus featuresexclusive audio commentaries with director roy ward baker and scriptwriter producer brian clemens on the town of no return, scriptwriter robert banks stewart on the master minds, scriptwriter roger marshall on dial a deadly number, director gerry o'hara on the hour that never was and director don leaver on the house that jack built.the series of no return exclusive audio interview with elizabeth shepherdarmchair theatre the hothouse starring diana riggusa chessboard opening sequencestrange case of the missing corpse promotional traileralternative end tag from death at bargain pricesepisode reconstructions for series 1 scripts kill the king and dead of wintercolourised test footage from death at bargain prices and a touch of brimstonereconstructed 'the avengers are back' john stamp traileralternative uk opening and closing creditsalternative uk animated bumpersuk animated bumpervariant opening title credits for the gravediggersfrench opening creditsgerman opening creditsitn newsreel footagestills galleries