Orso Maria Guerrini
Ettore Majorana
Luigi Pistilli
University assistant
Mariella Zanetti
Mariella
Loredana Savelli
Mariella's mother
Annalisa Fierro
Mariella's friend
Guido Alberti
S.E. Arturo Bocchini
Luigi Casellato
Inspector
Pietro Biondi
Enrico Fermi
Claudio Baglioni
Young man singing
