Sneak Peek of Tonight's "This Is Us" Season Finale

Tonight is the season finale of This is Us, and here's a sneak peek.  Notice how Jack Pearson is back, but much older.  Fan theories are running rampant, including that Rebecca is dead or dying, and that's why she's seeing Jack.  All I know for sure is that I'd better have plenty of Kleenex ready! -Cheryl Kaye