Dr. K and Malik Return in 'This Is Us' Season 4 Finale Sneak Peek (PHOTOS)

arrow - left
arrow - right
This is us Season 4 finale
Mitchell Haddad/NBC; Ron Batzdorff/NBC
this is us big 3
Ron Batzdorff/NBC

The Big 3 — Kevin (Justin Hartley), Randall (Sterling K. Brown) and Kate (Chrissy Metz) — get together for baby Jack’s birthday.

This is us toby baby jack kate
Ron Batzdorff/NBC

Toby (Chris Sullivan), baby Jack and Kate make the day a family affair.

This Is Us Kevin
Ron Batzdorff/NBC

Kevin looks contemplative.

this is us randall
Ron Batzdorff/NBC

Randall throws a look over his shoulder.

this is us kate
Ron Batzdorff/NBC

Kate is a doting mother.

Ron Batzdorff/NBC
Ron Batzdorff/NBC

The festive occasion turns sour for the Pearson brothers.

This is us kevin randall
Ron Batzdorff/NBC

Things grow tense between Kevin and Randall.

This Is Us kevin randall
Ron Batzdorff/NBC

The feud between Kevin and Randall gets even more heated.

This is us randall kevin
Ron Batzdorff/NBC

Kevin and Randall go head-to-head.

This Is Us rebecca miguel
Mitchell Haddad/NBC

Miguel (Jon Huertas) and Rebecca (Mandy Moore) have a serious conversation.

this is us uncle nicky
Ron Batzdorff/NBC

Uncle Nicky (Griffin Dunne) makes an appearance.

This Is Us season 4
Ron Batzdorff/NBC

Deja (Lyric Ross) and Malik (Asante Blackk) share a laugh.

This is us beth randall
Ron Batzdorff/NBC

Randall leans on Beth’s (Susan Kelechi Watson) shoulder.

This is us dr k
Mitchell Haddad/NBC

Dr. K (Gerald McRaney) makes a return.

1 of

This Is Us' Season 4 finale is nearly here, which means some major tension as the Pearson siblings and extended family convene for baby Jack's first birthday celebration.

In the episode titled "Strangers: Part Two," sibling contentions flare between Randall (Sterling K. Brown) and Kevin (Justin Hartley), likely due to the fact that Rebecca (Mandy Moore) agreed to participate in the clinical trial for her Alzheimer's despite her previous aversion. How will the family get-together conclude? Viewers will have to tune in to find out.

'This Is Us': Will the Clinical Trial Work? Why It May Not Help RebeccaSee Also

'This Is Us': Will the Clinical Trial Work? Why It May Not Help Rebecca

Rebecca's future has been teased various times throughout Season 4, could those flash forwards hold answers?

Until then, click through the gallery above for a sneak peek which teases the return of beloved Dr. K (Gerald McRaney), Malik (Asante Blackk) and Uncle Nicky (Griffin Dunne).

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