Suspects Facebook interview transcript for those of you who couldn't see it. It's very brief:
JM: I'm Jim Murray and I play DCI Drummond.
Damien Molony: Explains that instead of being stand alone episodes as before, the whole series of 6 episodes will focus on this one case, investigating Martha's death.
JM: There's lots and lots of twists and turns, lots of intertwined plots.
DM: Talk about it being Martha's death they're investigating.
JM: Every single character is involved in one way or another emotionally and personally with the storyline as it unfolds.
DM: Talks about the real, fly-on-the wall feel of the show.
And that's it. A few quick screenshots I grabbed below: