In 2013 they announced there would be a BBC 1+1, but it never happened. Probably a casualty of cost cutting, but iPlayer does make it unnecessary really.
quite often you can press the green button on your remote, which will show the programme from the beginning - look out for right hand corner of your screen, but others said it will likely be on i player anyway
Emmie, the writer Jed Mercurio has said he never wants that to happen - he wants people to be talking and thinking about it for a week.
I am recording the latest series and won't start watching until the series has finished, then I can watch it over a few days. I lose the plot if I have to a week between episodes