Director MASSIMO DALLAMANO
Writers BRUNO DI GERONIMO (Screenplay & Story), MASSIMO DALLAMANO (Screenplay & Story), PETER M. THOUET (Screenplay) (uncredited), EDGAR WALLACE (Novel "The Clue of the New Pin")
Produced by LEO PESCAROLO (as Leonardo Pescarolo) (uncredited, FULVIO LUCISANO (uncredited), HORST WENDLANDT (uncredited)
Music by ENNIO MORRICONE
Cinematography by JOE D'AMATO (as Aristide Massaccesi)
- ITALY 9 March 1972
- WEST GERMANY 9 March 1972 (Edited Version)
- SPAIN 4 June 1973
- USA May 1975
- UK 27 August 1996 (Video Premiere)
Also Known As
- ORIGINAL TITLE Cosa avete fatto a Solange?
- WEST GERMANY Edgar Wallace - Das Geheimnis der grünen Stecknadel
- UK Who's Next?
- UK (Video Title) What Have You Done To Solange?
Poster / Pics
- UNIVERSUM FILM "EDGAR WALLACE Das Geheimnis der grünen Stecknadel"
- DVD: NEO PUBLISHING COLLECTION GIALLO "Mais qu'avez-vous fait à Solange?"