Big Sky season 3: how to watch, recaps, cast and everything we know about the show

Kylie Bunbury and Katheryn Winnick in Big Sky
Kylie Bunbury and Katheryn Winnick in Big Sky (Image credit: ABC/Anna Kooris)

Big Sky season 3, aka Big Sky: Deadly Trails, brings the mystery to ABC's Wednesday night lineup.

Created by David E. Kelly (The Calling, The Lincoln Lawyer) and based on the book series by C.J. Box, Big Sky premiered in 2020 and had been a staple on ABC Thursday nights along with Station 19 and Grey’s Anatomy, but that has since changed.

Big Sky moved to a Wednesday night airdate for season 3, though its 10 pm time slot remains. This is all in addition to some new cast members and a brand new mystery that has eager to see what happens.

So, without further ado, let's dive into everything you need to know about Big Sky season 3.

How to watch Big Sky season 3

Big Sky season 3 has wrapped up in the US, with all episodes now available to stream on Hulu or through (if you have a TV service that carries the network, i.e. FuboTV, Hulu with Live TV, YouTube TV).

For UK audiences, episodes are still being released weekly on Disney Plus. As of January 18, the first five episodes are available on the streaming service.

Who is in the Big Sky season 3 cast?

The Big Sky season 3 added some new faces to the main cast of the mystery series. 

Once again leading the way for the show are Katheryn Winnick and Kylie Bunbury, as Jessie Hoyt and Cassie Dewell, respectively. But among the main players in this new season are other familiar faces like Jamie Lynn-Sigler (The Sopranos, Entourage), as well as new regulars in Jensen Ackles (The Boys, Supernatural), who was introduced as the new sheriff, Beau Arlen, in the season 2 finale, and country music legend Reba McEntire as Sunny Brick, who is described as the mercurial matriarch of the Brick family, successful backcountry outfitters with a secret history of missing customers.

Here is the official cast of Big Sky season 3 regulars:

  • Katheryn Winnick as Jenny Hoyt
  • Kylie Bunbury as Cassie Dewell
  • Dedee Pfeiffer as Denise Brisbane
  • Jamie-Lynn Sigler as Tonya Wallis
  • J. Anthony Pena as Deputy Mo Popperak
  • Jensen Ackles as Beau Arlen
  • Reba McEntire as Sunny Barnes

Also expected to appear throughout the season are Brian Geraghty as Ronald Pergman, Omar Metwally as Mark Lindor, Anja Savcic as Scarlet Leyendecker and Janina Gavankar as Ren. Rosanna Arquette has also been cast in a recurring guest star, playing Jenny Hoyt's criminal mother, Virginia "Gini" Cessna.

What is the Big Sky season 3 plot?

Big Sky follows a private detective and an ex-cop, Winnick’s Jessie and Bunbury’s Cassie, as they work together to solve cases impacting their community, from kidnappings to dealings with notorious crime syndicates.

Big Sky season 3 (or Big Sky: Deadly Trails as it is also being referred to), brings some new players to Helena, Mont. This includes the new sheriff, Beau Arlen, who first showed up in season 2 and a mysterious new couple who own the excursion company that looks to be at the center of the new season's mystery.

Here is the synopsis for Big Sky season 3 episode 1, "Do You Love an Apple," which should set the stage for the rest of the season.

"It’s been a few months of relative peace in Helena, but all that’s about to change when Sunny Barnes and her family set up Sunny Day Excursions just outside of town. From the moment they arrive, things begin to go awry, with Cassie being called in to investigate a missing backpacker and the new sheriff in town, Beau, partnering up with Jenny to track down a murderer on the loose. A mountainous mystery begins to unravel for Cassie Dewell and Jenny Hoyt."

Check out What to Watch's recaps of Big Sky season 3 episodes right here:

Is there going to be a Big Sky season 4?

There has been no word as of yet if Big Sky is going to be renewed for season 4 or cancelled. We'll update this page when that announcement is made.

Michael Balderston

Michael Balderston is a DC-based entertainment and assistant managing editor for What to Watch, who has previously written about the TV and movies with TV Technology, Awards Circuit and regional publications. Spending most of his time watching new movies at the theater or classics on TCM, some of Michael's favorite movies include Casablanca, Moulin Rouge!, Silence of the Lambs, Children of Men, One Flew Over the Cuckoos Nest and Star Wars. On the TV side he enjoys Only Murders in the Building, Yellowstone, The Boys, Game of Thrones and is always up for a Seinfeld rerun. Follow on Letterboxd.