Its back, Featherstone told Deadline.

Ive done sci-fi, horror and crime before but had never done [spies].

The show also stars Sarah Lancashire, Andrew Buchan and Omari Douglas.

‘Black Doves’

‘Black Doves’Ludovic Robert/Netflix

When it came toBlack Doves,serendipity was the word.

There was lots of serendipity and lots of speed, said Featherstone.

Its a different kind of pressure now, he added.

Netflix Alfred Hitchcock series

Ben Whishaw and Keira Knightley in ‘Black Doves’Netflix/Ludovic Robert

Doing these big sequences while having wit and irony takes such range.

I love seeing Keira Knightley being a mother and a wife then kicking arse.

In turn, Barton said Sister now feels like a creative home.

I am thrilled were doingBlack Dovesagain but very sad regardingKaos, Featherstone said.

That move came at the end of a tough year for Sister as market contraction bit.