Der Frosch mit der Maske
1960
The Indian Scarf
1963
Neues vom Hexer
1965
The Squeaker (1963 film)
The Dead Eyes of London
1966
The Inn on the River
1962
The Black Abbot (1963 film)
The Green Archer (1961 film)
1961
The Monk with the Whip
1967
The Hound of Blackwood Castle
1972
The Hunchback of Soho
The Curse of the Hidden Vault
1964
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Some sources included in this module are from JustWatch.
An investigator uses the mysterious White Frog emblem to solve a series of eerie crimes. Wikipedia