"This Is Us" Returns This Month and No One Knows What We're in Store For

The theme for season 4 of "This Is Us" seems to be that we don't know, well...anything. There are more new faces than familiar in the trailer, and cast and crew have been teasing an expansion all off-season. At least we know that the Pearsons are still going to be in the middle of it all. Match up these brand new scenes and theorize about what's to come on Sept. 24!