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December 23, 1973 (1973-12-23) –December 16, 1979 (1979-12-16)
Das unsichtbare Visier (German:[dasˈʔʊnˌzɪçtbaːɐ̯viˈziːɐ̯], The Invisible Visor) was an East German television series, broadcast between 1973 and 1979.[1] In its first and longest season it starred Armin Mueller-Stahl in the role of Werner Bredebusch, a Stasi agent active abroad under the alias Achim Detjen.