Enrico Maria Salerno as Dr. Giordani

Gabriele Ferzetti as Prof. Daniele Vallotti

Senta Berger as Suor Maria

Claudio Gora as Prof. Calogeri

Luciano Salce as Enrico

Enzo Garinei as Dr. Botti

Tina Lattanzi as Vallotti's Mother

Antonella Steni as Enrico's Wife

Pier Luigi Modesti as Dr. Loris

Claudio Nicastro as industriale farmaceutico

Gino Pernice as Lucio

Gabriella Boccardo as

Roberto Bisacco as Avvocato Donati

Ernesto Colli as Operaio

Piera Degli Esposti as signora Marchetti

Sandro Dori as Dr. Casati

Tom Felleghy as Professore alla riunione

Emilio Marchesini as dottor Azzina

Enrico Marciani as

Giuliana Rivera as

Giorgio Sammartino as

Aldo Vasco as

Federico Scrobogna as