“Sophia Bush is coming and playing a big secret part in our first episode back,” creator Dan Fogelman said at the TV press tour. “It’s also been reported a little bit that John Legend has a part in the episode that’s still not disclosed. And we also have a really cool guest star coming a little bit later in the season involved in Sterling (K. Brown)’s very intense storyline, that I can’t speak out: Pam Adlon.” He added: “I can’t say what she plays, because it’s a spoiler for Sterling’s story. But Sterling has an unbelievable arc in the back half of the season and she plays a very important — like, limited, but important role in his story.” ALSO: Fogelman shoots down This Is Us fan theories inspired by St. Elsewhere and How I Met Your Mother.