Umberto Spadaro as Detective Pietrangeli

Delia Scala as Silvia Pietrangeli

Andrea Bosic as Aldo Manni (as Andrea J. Bosic)

Marco Vicario as Giorgio Morelli

Natale Cirino as Palermo

Dorian Gray as Vandina

Marga Cella as Fosca

Amina Pirani Maggi as Giovanna

Dina Perbellini as la signora Rosini

Giacomo Furia as Leprotti

Enrico Glori as il maggiore

Loris Gizzi as il commendatore Marzocchi

Nino Marchetti as l'operaio dell'agenzia di pulizie