Big Sky is an American crime drama thriller series created by David E. Kelley and based on The Highway series of books by C. J. Box. The series premiered on ABC as a fall entry in the 2020–21 television season on November 17, 2020. In May 2021, the series was renewed for a second season which premiered on September 30, 2021. In May 2022, the series was renewed for a third season, subtitled Deadly Trails, which premiered on September 21, 2022.

The series is set in and around Lewis and Clark County, Montana.

The series, based on C. J. Box's novel The Highway and developed by David E. Kelley, was announced as The Big Sky in January 2020 and given a straight-to-series order by ABC. The series is produced by David E. Kelley Productions, A+E Studios and 20th Television. Kelley and Ross Fineman serve as executive producers, along with Box, Matthew Gross and Paul McGuigan. On June 17, 2020, it was announced that the series would air on Tuesdays at 10:00/9:00c. On December 7, 2020, ABC gave the series a six-episode back order, bringing the total number of first-season episodes ordered to 16. On May 4, 2021, ABC renewed the series for a second season. It was also reported that Elwood Reid who was added as an executive producer for the second half of the first season took the second season from Kelley. However, Kelley is still involved with the series and remains as an executive producer. On May 13, 2022, ABC renewed the series for a third season. The subtitle for the third season is Deadly Trails.

In case of emergency