'This Is Us': 5 Game-Changing Reveals From the Season 4 Finale (PHOTOS)
[Warning: This gallery contains MAJOR spoilers for Season 4, Episode 18 of This Is Us, "Strangers: Part Two."]
This Is Us served up some seriously game-changing details in the Season 4 finale's final moments, from new family members to possible relationships. Needless to say, it was hard to keep jaws from hitting the floor as reveals came one after another.
Whether it was Kevin's (Justin Hartley) twins or Jack Damon's (Blake Stadnik) sister, there wasn't a twist that didn't leave viewers thinking long after the credits rolled.
In the gallery above, we're breaking down the finale's biggest surprises, including those twins, the sister, and Uncle Nicky's wedding ring. Click through for some possible clarity, theories and more.
This Is Us, Season 5, TBA, NBC