Richard Harrison as Richard Werner aka Karl Meyer

Adolfo Celi as Karl Maria van Beethoven

Judi West as Deborah Sands

Gustavo D'Arpe as Professor Krohne

Fabienne Fabre as Alice - the nurse

Nino Fuscagni as Leonard 'Zio Mac' MacFitzroy

Enzo Fiermonte as General Van Pelt

Gislaine Barbot as The Young Nurse

Anita Cortinovis as The Red-haired Nurse

Salvatore Porcaro as Morgue Employee (uncredited)