Actori
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Laurence OlivierVincent Lunardi
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Frederick CulleyRoger Bacon
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Andrea ChecchiZoroastro
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Michael Rennie (I)Rol de o replică
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Percy MarmontWilbur Wright
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Carlo NinchiGabriele Adanti di Perugia
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Hay PetrieTiberius Cavallo
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Derrick De MarneyRol de o replică
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Charles FrendNarator
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John TurnbullVon Zeppelin
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Henry VictorOtto Lilienthal
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Franklin DyallJerome de Ascoli
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Ben WebsterLeonardo da Vinci
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Bryan PowleySir George Cayley
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Alan WheatleyBorelli