Peaky Blinders season 3 question *edited by MNHQ at OP's request*

[InvisibleWomenMustBeRead]

I'm late to the PB party so just currently watching season 3 - who actually killed Grace & why? I assume revenge on Tommy but whose revenge & why?

Also, where did the Russians come from / how did Tommy come to do business with them?

Just noticed my phone auto corrected the title - so annoying! I obviously meant Peaky Blinders!