Board Thread:Spoilers!/@comment-25375217-20180117025415/@comment-5899967-20180117095944

It's definitely a special episode as we predicted, they are probably celebrating the 150th episode since they won't get to 200th, it's understandable. The question is whether there will be returning guests or not, but it's important storywise, like Souls of the Departed was, even though that was more special, with a dozen of people between returning characters and cameos.