Quote Originally Posted by Marcus View Post
In Russian there is only one correct variant of this sentence

May be "rules"?! Is English punctuation studied at school?
English allows for some user discretion. While the original is correct you can also write:
Does anyone know what it was about; who did it and why?
Does anyone know what it was about, who did it, and why? (a bit awkward)
Does anyone know what it was about, who did it and why?
A strict grammarian could probably find fault with some of that but they read fine to me.