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Blackballed by his peers, crackpot conservationist Zacardi (Vladek Sheybal) intends to get even with his highly trained birds, which swoop down and kill on his orders. Steed (Patrick MacNee), Purdey (Joanna Lumley) and Gambit (Gareth Hunt) endeavor to stop Zacardi in his plan to take over the world with his feathered friends. The climax of this episode (the top-rated installment of The New Avengers' first season) finds Purdey in perilous predicament that would even make Alfred Hitchcock nervous.