and there seems to be yet another Mitchell that we didn't know about, I see a whole can of worms opening up here.
It'll turn out that the other Mitchell will be someone we've already seen and got used to in the soap and he'll be the person who killed Archie. Sorry I like Eastenders, honest. Just a predicable plot line, if I've got it wrong, then I'll eat my hat (I haven't actually got a hat by the way)