In "Brothers," the show's three timelines converge around fractured and forming bonds. A 1990 flashback reveals Jack had a younger brother named Nicky — the earliest glimpse yet into his past — as Jack takes Kevin and Randall camping to build the connection he knows can be lost; at home, Rebecca drives alone to meet Jack's dying alcoholic father for the first time. In the present, Kate tells Toby she is eight weeks pregnant but shuts down his hope, bracing against loss; Kevin spirals deeper into Vicodin dependency at Sophie's charity gala, missing his auction slot and humiliating her publicly; and Randall follows Deja into a women's bathroom after a reflexive arm-grab sends her retreating, where she finally discloses the abuse she endured in a previous foster home.

This episode marks the first structural reveal that Jack had a sibling, refr ...