English millionaire Sir Cyrus Bradley is being blackmailed by “The Tortoise” Crime Syndicate. He is to pay £ 100,000.00 Pounds to stay alive and not be murdered. After his refusal to pay the money, he is quickly killed. Cyrus‘ nephew, Don Micklem, plans to avenge the death of his uncle and sets out on a quest to expose “The Tortoise“…
Unfortunately the movie Mark of the Tortoise is not yet available on HBO Max.
| Writing | Johanna Sibelius | Screenplay |
| Writing | Eberhard Keindorff | Screenplay |
| Directing | Alfred Vohrer | Director |
| Camera | Lilo Winterstein | Still Photographer |
| Sound | Werner Schlagge | Sound |
| Production | Wolfgang Kühnlenz | Production Manager |
| Directing | Eva Ebner | Assistant Director |
| Writing | Will Tremper | Writer |
| Art | Mathias Matthies | Art Direction |
| Art | Ellen Schmidt | Art Direction |
| Camera | Bruno Mondi | Director of Photography |
| Production | Horst Wendlandt | Producer |
| Sound | Martin Böttcher | Original Music Composer |
| Costume & Make-Up | Irms Pauli | Costume Design |
| Writing | James Hadley Chase | Book |
| Editing | Hermann Haller | Editor |
