I was just on IMDB, checking
my brother's profile (as you do), and I noticed that they had information up for Season 4! He's scheduled to appear in episode 1, and then go away for a while. BUT, he should be back again in episodes 10-13! So, it's time to play Guess the Storyline! Will he be brought into the new agency after Peggy decides to join a lesbian commune? Will SterlingCooperDraperPrice collapse and they all have to get jobs waiting tables at the Bohemian art house restaurant that Kinsey opened after leaving the gutted Sterling Cooper? Will Paul Kinsey join forces with Harry and Ken to form their own company as ad men, moonlighting as a trio of crime fighters?
Who knows!!
What I'm hoping for is that the events at the end of season 4 lead us into season 5, which has plenty of Paul Kinsey in it. Because I want my brother to keep his job.
There is the danger, of course, that without enough Paul Kinsey, season 4 might blow goats. Not a certainty, mind you. Just speculation.