I've seen The Detective , it's a pretty straight up detective story. Worth seeing, but if Die Hard had wound up starring Frank Sinatra (who had first refusal on the role when the second book was adapted to film) it would have been a vastly different film. Sinatra was also offered the title role in Dirty Harry and turned it down. Sinatra was a talented actor, but I doubt either one of those movies would have become the cultural touchstones they are today with him in the lead role.