NBC’s new drama Line of Fire premieres Monday, September 21, at 10 p.m. ET/PT. Peter Krause and Hope Davis lead the series as members of the Hollingsworth family, a group whose jobs stretch across several major federal agencies.

The family includes agents and officials connected to the FBI, U.S. Marshals, Secret Service and Department of Justice. That gives them the experience to handle difficult cases, but it also means professional rules can collide with family loyalty when one of their own is in danger.

Charlie Barnett appears in a suit during a tense scene in Line of Fire.
Charlie Barnett is part of the federal family at the center of the new NBC drama.

A marshal’s death opens a larger case

The story begins when a U.S. Marshal dies in the line of duty. What first looks like a clear case becomes a conspiracy, and a mysterious assassin turns the Hollingsworth family into the next target. The same jobs that taught them how to protect other people now become the tools they need to protect each other.

The trailer shows family arguments, armed operations and quiet moments when the Hollingsworths try to understand who may be watching them. It also suggests that following the law will not always give them the safest answer. NBC’s official description says they may have to betray their sworn code to bring the killer to justice.

Three members of the Line of Fire family sit together outside at night.
The Hollingsworths must put personal disagreements aside after their family becomes a target. · Credit: NBC

Who is in the Line of Fire cast?

Krause and Davis are joined by Kat Cunning, Tommy O’Brien, Taylor Bloom and Charlie Barnett. The ensemble format lets the investigation move between agencies instead of staying with one office or one type of case.

Barnett’s presence also gives NBC another connection to its Chicago dramas; he previously played Peter Mills on Chicago Fire. Krause comes to the series after leading 9-1-1, while Davis brings a long list of film and television roles that includes Your Honor and Succession.

The family works across several agencies instead of staying inside one office. An FBI lead, a Marshal operation and a Secret Service assignment can reach different parts of the same conspiracy. NBC has not announced the season’s episode count or released individual episode titles.

A young man lies on fallen leaves in a dark scene from Line of Fire.
A marshal’s death opens a case that quickly grows into a wider conspiracy. · Credit: NBC

Josh Safran created the new NBC drama

Josh Safran writes and executive produces Line of Fire. His television work includes Quantico, Gossip Girl and Soundtrack. Jenna Bush Hager and Ben Spector also executive produce, while Rebecca Thomas directed the pilot and serves as an executive producer for that episode. Universal Television produces the series.

The premiere follows The Voice on NBC’s Monday schedule. Episodes are also expected on Peacock after their NBC broadcast, subject to the service’s regional availability. Every family member knows how federal protection works, but the assassin knows enough to reach them anyway.