Torchwood: Children of Earth started in the US on BBC America last night and runs for the next four nights, kind of a mini-series of a season. You can already get Torchwood: Children of Earth at iTunes for $2.99 per episode in HD (or $1.99 for standard). Not bad if you don’t have BBC America in your cable package. Generally, iTunes has been that fast for US shows, but I don’t think they’ve been that fast with the BBC shows (or maybe it just seems longer since the BBC airs them so much earlier in the UK). I’m not sure what they’ll charge for the whole season once it’s available later this week (Torchwood seasons Season’s One and Two episodes are only $1.99 for HD and $0.99 for standard definition and you don’t even have to buy the whole season).
Amazon has it on pre-order Blu-ray or DVD which ships next week.