Joe Absolom's return to the series as Al Large. He had not been in the third season.
On hulu this episode is called the gp always rings twice.
Al Large had not been in the third season, but the third season was only one 2-hour episode. That episode, On The Edge, is now... on streaming platforms... the final episode of season 2. So while technically, the actor Joe Absolom missed the third season, he really only missed a total of four episodes including the first three of Season 4, which is now considered Season 3.