Mathieson wrote on his blog:
"So... they quite liked the first script I delivered and asked me if I'd like to write another. They quite liked that one too. Then they decided to put them next to each other in the schedule as episodes 8 and 9. No pressure."
As we previously announced, Mathieson has penned Episode 8 of the new season. It has now been confirmed by the man himself that he has also written Episode 9. The episode, the title for which has not been officially announced yet, will be directed by Douglas Mackinnon and guest stars Christopher Fairbank (Alien 3), Joivan Wade (Youngers) and Matt Bardock (Casualty).