Main •
Ryan Phillippe as Former
GySgt Bob Lee Swagger, a highly trained
Marine Raider Scout Sniper and medically retired Marine. •
Shantel VanSanten as Julie Swagger, Bob Lee's wife •
Cynthia Addai-Robinson as Nadine Memphis, an
FBI agent investigating Swagger •
Omar Epps as Former
Captain Isaac Johnson, a
Secret Service Agent, who was Swagger's commanding officer in
Marine Raider Regiment. •
Eddie McClintock as Jack Payne, a figure involved in the conspiracy against Swagger (season 1; guest, season 3) •
Josh Stewart as Solotov, a
Chechen master sniper with whom Bob Lee has tangled before (seasons 2–3) •
Jesse Bradford as Harris Downey, a D.C. staffer who was once involved with Nadine (recurring, season 2; main, season 3) •
Gerald McRaney as Red Bama Sr., owner of Bama Cattle and an Undersecretary in the
Department of Agriculture (season 3)
Recurring •
David Andrews as Sam Vincent, Bob Lee's close friend and lawyer. (season 1, 3) •
David Marciano as Howard Utey, Nadine Memphis' superior at the FBI (season 1) •
Lexy Kolker as Mary Swagger, Bob Lee's and Julie's daughter •
William Fichtner as Rathford O'Brien, Bob Lee's former shooting instructor •
Tom Sizemore as Hugh Meachum, a CIA
black ops operative with mysterious motives (season 1) •
Rob Brown as Donny Fenn, Swagger's best friend and spotter who was killed by Solotov (seasons 1–2) •
Sean Cameron Michael as Grigory Krukov, a Russian
FSB agent (season 1) • Delaina Mitchell as Anna Wallingford, Julie's married sister and Mary's aunt (season 1, 3) •
David Chisum as Jim Wallingford, Anna's husband and Julie's brother in law (season 1) •
Michelle Krusiec as Lin Johnson, Isaac's loyal wife (season 1-2) • Matt Shallenberger as John Wheeler, a mysterious and deadly Atlas operative (guest: season 1, recurring: season 3) •
Desmond Harrington as Lon Scott, the CEO of Anhur Dynamics (season 1) •
Beverly D'Angelo as Patricia Gregson, a former
National Security Advisor •
Jerry Ferrara as Kirk Zehnder, a former marine who always detects a conspiracy and is part of the core team of Bob Lee Swagger (season 2) •
Todd Lowe as Colin Dobbs, a former marine in Swagger's unit, now living in Texas an hour from the Swagger Ranch (season 2) •
Patrick Sabongui as Yusuf Ali, a core member of Swagger's original Marine team (season 2) •
Jaina Lee Ortiz as Angela Tio, an active duty Marine who formerly served with Bob Lee's unit (season 2) •
John Marshall Jones as Sheriff Brown, the local law enforcement in Bob Lee's hometown and a long-time friend (season 2–3) •
Harry Hamlin as Sen. Addison Hayes, a mysterious and powerful mastermind whose agenda will collide with Swagger (seasons 2–3) •
Troy Garity as Jeffrey Denning, a seasoned
investigative journalist who cares deeply about justice being served (season 2) •
Derek Phillips as Earl Swagger, Bob Lee's father, a
Vietnam veteran who was sheriff in Bob Lee's hometown before he was killed in 1988 (season 3) • Tait Blum as Young Bob Lee (season 3) • Conor O'Farrell as Rick Culp, a
West Texas prison guard who may have been involved in Earl Swagger's death (season 3) •
Eric Ladin as Red Bama Jr., Red Sr's screw-up of a son who desperately wants his father's respect and confidence (season 3) •
Brian Letscher as Bert Salinger, an employee of Red Bama Sr. who watches over Red Jr. (season 3) •
Felisha Terrell as Carlita Cruise, a former Atlas operative embedded in the Dept. of Agriculture who helps Nadine and Isaac take down her former employers (season 3) •
Mallory Jansen as Margo, an Agent for the
Department of Justice who has been attempting to bring down Atlas for years (season 3) •
Kurt Fuller as Andrew Gold, the
Deputy Chief of Staff to the
U.S. President and high ranking Atlas member (season 3) •
Dee Wallace as Katherine Mansfield, the long-time former mission planner for Atlas who is now forced to reside in a
mental institution (season 3) •
Michael O'Neill as Ray Brooks, a
Federal judge nominated for a vacancy on the
U.S. Supreme Court and Atlas operative (season 3) ==Production==