User blog comment:Diotoir the son of nemesis/Robots that need information about them/@comment-27663167-20160203183306/@comment-4700688-20160216160843

Diotoir, if that mystery robot was Raging Knightmare, that would make this a Series 7 image, which would make the existence of Cerberus quire mysterious. I'm fairly sure thus is a Series 6 image, but you could always ask John Lear on Facebook.