dragnet show covers the fans all over the world
It was a great show! We wouldn't have stuff like Law & Order or NYPD Blue or any cop shows if not for Dragnet. 
this show describe chaotic stories in real
Yes its really interesting how they based the episodes on real cases and showed the real-life outcomes at the end of each case. 
and it also describe detective crime cases
I think one of the reasons that the show was so successful was that the detectives were both good guys. They seemed like they really cared and wanted to help. 
yes and oldies are also described in this show
It is a classic for a reason. Jack Webb did another show, Adam-12, not about detectives but about beat cops. A lot of people really like that one too but I couldn't get in to it. 
you can see it in this point of view like classic cop and detective shows
Never thought about it like that but I guess I like detective shows more than cop shows then. 
detective shows are best than cop shows