By Jed Mercurio's standards, this was a subdued opening episode of series 6.
I am sure I was not the only one who thought Kate Fleming was working undercover, investigating DI Jo Davidson (Kelly Macdonald.)
In fact Kate has left AC-12. She and Jo are looking at the murder of a dead journalist Grace Vella.
On the way to arrest a suspect, Davidson spots an armed robbery in progress. A source tips DI Steve Arnott of her concerns about this.
Arnott is also looking to move away from Internal Affairs. The set up though looks like a likely reunion of the classic line up.
There were no shocks are surprises in the opener. There were some familiar characters that have woven in and out of the previous series.
Such as Terry, the man with Down's syndrome whose freezer was used in series 1 to hide the body of Jackie Laverty.