Actor Deniz "Marshall" Ölmez who plays Marco Parese is actually half Turkish and half Neapolitan. He speaks Italian fluently.
The Scene when the Italian baby picks either the knife or the key was completely unforeseeable. The director left the result completely by chance.
The main actor Andreas Karl Wilke who plays "Antonio Tegano" is actually of calabrian descent. His mother is from Cosenza. The irony of destiny is that her maiden name is also "Tarantella".
One of the consultants of the movie who was an affiliate of the 'Ndrangheta was killed half a year after shooting for undisclosed reasons.
The filmmakers met with an active member of the 'Ndrangheta while researching for the screenplay. They only gained the high ranking member's trust by genuinely laughing about his macabre stories about failed assassination attempts.