Mark Kermode: Despite the claims of gun lobbyists that "an armed society is a polite society", there's plenty of evidence that keeping a firearm in your house makes it a more (rather than less) dangerous place to live. In the gripping opening movement of this self-consciously pulpy, 80s-set thriller, fidgety father and husband Richard Dane (Michael C Hall, shedding the killer instinct of his title role in Dexter) loads and then accidentally discharges his daddy's gun, responding with tre find out more...