There were 32 Rialto movies based on works of Edgar Wallace. Beginning with the fourth production "Der grüne Bogenschütze" ("The Green Archer", 1960/61), the leading examples of the genre were made under the artistic supervision of Horst Wendlandt and directed by Alfred Vohrer or Harald Reinl. Following "Der Bucklige von Soho" (1966), all of Rialto's Krimis movies were shot in color. Additionally, the original novels were increasingly disregarded in favour of new stories based on motives from the stories. On one hand, this departure made them seem more up-to-date – on the other, the dramaturgy, presentation and content quality levels declined rapidly. From 1969 onwards, Rialto Film started four coproductions with Italian producers to minimise their costs. Audiences increasingly ignored the series, which ended with "Das Rätsel des silbernen Halbmonds" in 1972.