This Is Us Season 4 -

Matriarch Rebecca Pearson begins to experience noticeable memory lapses. She is eventually diagnosed with mild cognitive impairment, heavily implied to be the early onset of Alzheimer's disease.

Milo Ventimiglia (Jack), Mandy Moore (Rebecca), Sterling K. Brown (Randall), Chrissy Metz (Kate), and Justin Hartley (Kevin) all return as the core Pearson family. This Is Us Season 4

premiered on September 24, 2019, and concluded on March 24, 2020, consisting of 18 episodes. Creator Dan Fogelman and the writers continued expanding the show's massive timeline, focusing heavily on expanding the Pearson family history while introducing brand new, life-altering characters. 🔑 Key Plotlines Brown (Randall), Chrissy Metz (Kate), and Justin Hartley

Joining the ensemble in Season 4 were Jennifer Morrison as Cassidy, Asante Blackk as Malik, Blake Stadnik as adult Jack Damon, and Tim Matheson as Rebecca's father, Dave Malone. 🔑 Key Plotlines Joining the ensemble in Season

The couple must adjust to raising their baby, Jack, who was born blind. The emotional strain and Toby's coping mechanisms create deep friction in their marriage. 🎭 Cast & New Additions