8 Clues That Rebecca Is in Trouble on 'This Is Us' (PHOTOS)

Meaghan Darwish

[Warning: This gallery contains MAJOR spoilers for Season 4, Episode 8 of This Is Us, "Sorry."]

This Is Us isn't backing away from its usual family drama, but in the most recent installment "Sorry," we were given plenty of reasons to worry about Rebecca (Mandy Moore).

The Pearson matriarch got confused a number of times throughout the episode, had various mood swings, and exhibited a strong fixation with her (frequently lost) cell phone, among other things. Her behavior certainly has us concerned and for those familiar with the signs of memory loss via diseases like Alzheimer's and dementia.

5 Theories About the Mark & Kate Mystery on 'This Is Us'

5 Theories About the Mark & Kate Mystery on 'This Is Us'

Could the blossoming relationship turn sour soon?

As viewers will recall, it was unveiled that the mysterious "her" figure introduced in Season 2 was Rebecca and in the Season 3 finale, Randall (Sterling K. Brown) goes to his mother's bedside, announcing who he is. From what we know of the future, these signs shown by Rebecca are definitely of concern.

In the gallery above we look at clues suggesting she's on her way to dealing with a disease that plagues so many.

This Is Us, Tuesdays, 9/8c, NBC