Mark of the Tortoise

Sir Cyrus Bradley (Hans Paetsch) sneered at the blackmail signed by "the Tortoise"--and wound up slain by a knife-throwing assassin. His nephew Don Mickelm (Götz George) was determined to find answers when Scotland Yard couldn't...but in tracking a suspect noble (Richard Münch) to his Italian castle, can he escape the awaiting death traps? Adaptation of James Hadley Chase's "Mission to Siena" co-stars Hildegard Knef, Klaus Kinski, Pinkas Braun. 90 min. Standard; Soundtrack: English. Dubbed in English.