Ipotesi sulla scomparsa di un fisico atomico

Orso Maria Guerrini

as Ettore Majorana

Luigi Pistilli

as University assistant

Mariella Zanetti

as Mariella

Loredana Savelli

as Mariella's mother

Annalisa Fierro

as Mariella's friend

Guido Alberti

as S.E. Arturo Bocchini

Luigi Casellato

as Inspector

Pietro Biondi

as Enrico Fermi

Claudio Baglioni

as Young man singing