[s3e4] Vietnam Apr 2026

The episode reveals the origin of Jack’s "breathe" calming technique, which he learned from his comrade Donnie Robinson in Vietnam. Robinson used the method to cope with the fear of his own father's abuse, and Jack later passed it down to his son, Randall.

Jack, serving as a staff sergeant, is reassigned to a remote village after his unit is ambushed. He discovers he is stationed near Nicky, who has been disciplined under an Article 15 for reckless endangerment. The episode ends with their tense reunion in the field. [S3E4] Vietnam

In the episode ( This Is Us , Season 3, Episode 4), the narrative uses a unique reverse-chronological structure to explore Jack Pearson's origin story and his relationship with his younger brother, Nicky. Reverse Timeline Highlights The episode reveals the origin of Jack’s "breathe"