'It's time to stop' - TV drama Silk writer

For three years, millions of viewers have been hooked on the BBC drama Silk, which follows the legal and personal trials of barrister Martha Costello.

But now the case is drawing to a close, with just two episodes left of the current series - which is to be the show's last.

Writer Peter Moffat and actress Maxine Peake, who plays Martha, talk about bringing the TV drama to an end.