| Series cast summary: |
 | Liane Hielscher | - | Cornelia Mettler / - 13 episodes, 1975-1979 |
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| Peter Petran | - | Der alte Heuber 12 episodes, 1975-1979 |
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| Carlo Schultheiss | - | Monteur Klöß 12 episodes, 1975-1979 |
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| Paolo Frassica | - | Paco 11 episodes, 1975-1979 |
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| Michael von Rospatt | - | Monteur Weitz 11 episodes, 1975-1979 |
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 | Gernot Endemann | - | Herr Pfeffer / - 10 episodes, 1975-1979 |
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| Sylvia Dudek | - | Fräulein Mattick 9 episodes, 1975-1979 |
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| Benno Sterzenbach | - | Karl Brensberger 8 episodes, 1975-1976 |
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| Gerd Baltus | - | Herr Schmitting 8 episodes, 1975-1976 |
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| Hans Weicker | - | Herr Wüller / - 8 episodes, 1975-1976 |
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| Günter Pfitzmann | - | Jochen Neubert 7 episodes, 1975-1976 |
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| Lutz Mackensy | - | Thomas Dietz 7 episodes, 1976-1979 |
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| Wera Frydtberg | - | Vera Neubert 7 episodes, 1975-1976 |
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 | Gundolf Willer | - | Herr Jünger 7 episodes, 1975-1979 |
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 | Christoph Quest | - | Dr. Heinz / - 7 episodes, 1975-1979 |
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| Jutta Zech | | 7 episodes, 1975-1978 |
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 | Karl-Heinz Hess | - | Herr Joost 6 episodes, 1975-1976 |
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| Eva Zlonitzky | - | Frau Schmitting 6 episodes, 1975-1976 |
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| Jürgen Scheller | - | Herr Schöllcke 6 episodes, 1975-1976 |
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| Michael Graff | | 6 episodes, 1975-1976 |
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| Thomas Opel | | 6 episodes, 1976-1979 |
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