Nicola Walker and Peter Firth

[Forever Secret]

It's a good point, about PF and NW creating the chemistry between H/R...
In the beginning there was nothing much there, as the series go on it develops, but if you just read the script it's not obvious just by reading it that there's any chemistry there, it all comes from the way PF and NW acted it out... (Which was brilliant)

Series 4 Spoiler: show

I think it was said in the Audio Commentary for 4.9 as well tha NW made an acting choice in the bus scene, and it worked perfectly,

I agree though,

Series 8 Spoiler: show

there's a different... kind of underlying chemistry since Ruths return, perhaps because the writters are now writting specificaly for them, before it seems they weren't, the relationship just developed on it's own

I agree with A Cousin here I think for S10, they should get rid of the "Will they/Wont they" stuff, it's been going on for so long now, H/R should just get/be together and the actors should be left too it, part of the reason the H/R stuff is so great, the main reason is because of how brilliantly PF and NW act...