Ken Clark as Dick Hallam

Irina Demick as Sylvie Meynard

Luigi Vannucchi as Brook

Loredana Nusciak as The Shadow's Agent

Jacques Berthier as Colonel Callaghan

Carlo Hintermann as The Shadow's Agent with furry collar

Michel Bardinet as Francisco Aguirrez

Giampiero Albertini as Cunningham's Chief Agent

Angelo Infanti as Pedro Almereyda / Max Schulz

Franco Giornelli as Cunningham's Agent

Andrea Scotti as Cunningham's Agent Disguised as a Nurse

Solvi Stübing as Hotel Maid

Dario De Grassi as Brook's Agent

Adriano Uriani as

Antonio Marsina as Brook's Agent

Peter Blades as

Loris Bazzocchi as Brook's Agent Looking After Hallam

Mirella Pamphili as

Valentino Macchi as Cunningham's Agent Disguised as a Nurse

Grégoire Aslan as Shadow

Tom Felleghy as The Manager of 'Baumkuchen'

Vanni Materassi as The TV Technician

Fulvio Mingozzi as Guest at 'Baumkuchen'