Unlike the previous seasons, which had 10 episodes each, the fourth season will have a total of fourteen and will be split in two parts.
- Jason Bateman as Martin “Marty” Byrde
- Laura Linney as Wendy Byrde
- Sofia Hublitz as Charlotte Byrde
- Skylar Gaertner as Jonah Byrde
- Julia Garner as Ruth Langmore
- Lisa Emery as Darlene Snell
- Charlie Tahan as Wyatt Langmore
- Felix Solis as Omar Navarro
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