For londonspook who asked for Ros/Malcolm and secret nerd.
. . .
It comes as something of a surprise to discover that Ros is a secret nerd. Malcolm tells himself that nothing about Ros should surprise him anymore, which is easier said than done.
Little by little, they drift into a friendship, talking about trackers and listening devices and computer programmes. He learns that she has a wicked sense of humour and a beautiful smile; that she takes her coffee black and likes her chocolate bitter.
He also learns that she's lonely, and her heart is not made of stone. But that is the one thing that doesn't surprise him at all.