Ray Milland

as Inspector Timpson

Dalila Di Lazzaro

as Glenda Blythe

Michele Placido

as Antonio Attolini

Mel Ferrer

as Professor Henry Douglas

Howard Ross

as Roy Conner

Ramiro Oliveros

as Inspector Ramsey

Fernando Fernán Gómez

as Forensics Detective

Antonio Ferrandis

as Nottingham