Torchwood writer Russell T Davies on new thriller

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With a fourth series of sci-fi drama Torchwood due to be shown later this year, writer and producer Russell T Davies explains what viewers can expect from the new episodes, which have been partly shot in the United States.

Davies says the 10-episode series, Torchwood Miracle Day, which crosses between Los Angeles and Cardiff, is a "great, big urban thriller". But there were still tough decisions for producers on the BBC Wales co-production.

He also reveals whether he regrets giving up the writing duties on Dr Who, and talks of his plans to move on from the sci-fi genre.

Davies was talking to BBC Wales Today's Carwyn Jones.

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