On Tuesday night, Jack is going to Vietnam.
And youre going to… get some answers about his past.
This episode really focuses on the formative brotherhood of these two boys and young men.

Ron Batzdorff/NBC
This episode starts filling in those pieces.
Viewers have an inkling that Jack has undersold the traumas in his life, namely his service in Vietnam.
Now comes the time to stitch those frames together, albeit in an unconventional narrative style.
(OBrien co-wrote the episode.)
Its fair to say Jack is probably one of those people.
Its about Vietnam, but at its core, its really about two brothers.
One goal of the episode is to help you understand the SuperDad era of Jack Pearson.
It also answers questions about Jacks brother that have loomed over the show.
I dont think by the episode youll have many of those questions anymore, says Fogelman.
And as you know by now, onThis Is Us, everyone is still in the painting.