I was watching Doctor Who on BBC America and I saw ads for the new season of Ripper Street. I remember seeing an episode a few weeks ago and found it intriguing and so I thought I might try watching the new season. But like any new viewer to an established show there can be homework. So since I know there are a lot of folks from the UK and people who watch bbc America here I thought it was a good place to ask. I would like to avoid spoilers but if they're unavoidable I understand.