Why Gene Wilder created a jealous sibling to challenge the world's greatest detective

Entertainment · Published 3 October 2026 Swipe more like this →

In short: When asked to spoof Sherlock Holmes, Gene Wilder hesitated to mock an icon. Instead, he invented Sigerson, an insanely jealous younger brother living in the detective's shadow. This 1975 musical comedy marked Wilder's directorial debut, blending slapstick humor with a genuine affection for the Victorian mystery genre he playfully dismantled.

The film originated from a lunch conversation between Gene Wilder and producer Richard Roth. While Wilder initially resisted the idea of parodying Holmes, he became intrigued by the concept of a sibling defined by resentment. Wilder wrote the screenplay while finishing his work on Young Frankenstein, intentionally crafting roles for his frequent collaborators, including Marty Feldman and Madeline Kahn. Mel Brooks, who directed Wilder in Young Frankenstein, correctly predicted that this project would launch Wilder’s career as a writer-director.

The plot follows Sigerson Holmes, a private investigator who has spent decades toiling in obscurity. When Sherlock Holmes decides to lie low, he delegates a high-stakes case involving a stolen document to his brother. The narrative descends into chaos as Sigerson navigates a web of blackmail involving a music hall singer, a duplicitous opera star, and the criminal mastermind Professor Moriarty. The climax features a sword fight and a clever switch involving a game of tic-tac-toe, highlighting the rivalry between the brothers.

Upon its 1975 release, the film received a mixed critical reception. Some reviewers, such as Vincent Canby and Arthur D. Murphy, praised its charm and Wilder’s inventive comic direction. Others, like Gene Siskel and Pauline Kael, found the story lacking and the characters underdeveloped, arguing that the film functioned more as a collection of individual comedic performances than a cohesive mystery. Despite these varied opinions, the film earned $9.4 million in North American rentals and established a template for Wilder’s subsequent directorial features, including his 1977, 1984, and 1986 projects.

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