Season three of NBC tearjerker "This Is Us" is finally set to provide viewers with some more clues about Beth Pearson (Susan Kelechi Watson), with an entire episode devoted to the character set to debut later this season. And it's clearly aiming to be awesome, based on its recent guest casting.

The latest actor set to appear in the installment is Goran Višnjić, a TV vet known for roles on celebrated series including "ER" and "Timeless." Višnjić is set to play a character named Vincent, described as a teacher of Beth's.

In true "This Is Us" fashion, though, it's not entirely clear what -- or when -- that means. Is he a school teacher of the family matriarch, seen in flashbacks when Beth is a girl? Does he pop up in the present? Or does he have something to do with the future, and that scene featuring a grim-looking Beth at a dance studio, about to go visit "her" -- a.k.a. Rebecca (Mandy Moore).

Višnjić's role is set to be recurring, suggesting he'll be involved in the present/future timelines. Fans will just have to tune in to find out what happens.

The other big guest star who will pop up in Beth's backstory episode is Phylicia Rashad, who will play Beth's mother, Carol. We can't wait to see these two formidable actresses sizzle on the small screen together.

"This Is Us" returns for its midseason premiere tonight, Tuesday, January 15 on NBC.

[via: Entertainment Weekly]