•
Luke Mitchell as Captain John "Abe" Abraham, a third-generation
Marine Infantry Officer who was wounded while serving in
Afghanistan and became an attorney after being deemed medically unfit to serve in direct combat. He is a member of
Marine Corps Base Quantico's Trial Services (prosecutor's) Office. •
Anna Wood as Captain Maya Dobbins, an eight-year veteran Marine and member of the Defense Services Office at MCB Quantico. She is from
Winston-Salem, North Carolina, where her older brother Matt is running for election to the
North Carolina State Senate. When his mental health issues force him to drop out of the race, the national political party asked Maya to run in his place, which she declined as she felt she wasn't yet ready to leave the Corps for political office, although that remains her long-term goal. •
Ato Essandoh as Major Trey Ferry, MCB Quantico's invaluable Legal Administrative Officer with almost nine years of service. A native of
Dearborn, Michigan, Rami enlisted in the Marines as a path to become a United States citizen; on the eve of his citizenship test, Rami decided to protest the suspension of the
MAVNI program, which caused him to be temporarily reassigned to the
United States Marine Corps Training and Education Command until his friends convinced him to take the test lest he languish the rest of his career in a glorified
rubber room. In "Legit Bad Day", Rami officially becomes a US citizen. He has been married for four years and has a daughter. •
Phillipa Soo as 1st Lieutenant Harper Li, a young Marine nine months out of
Officer Candidate School, assigned to Captain Abraham as his second chair. A native of
San Francisco and a graduate of
Stanford University and
Stanford Law School, Harper comes from a family of litigators who view her joining the Marine Corps as "backpacking through Europe after law school". While on a fact-finding mission overseas, Harper finds herself in combat for the first time alongside a group of
MARSOC Raiders, during which she earns a
Bronze Star with
Combat "V" after taking command upon the death of the platoon commander. In "Legit Bad Day", Harper leaves for
SERE School for six weeks. •
Dana Delany as Colonel Glenn Turnbull, who oversees the attorneys and helps them navigate the politics surrounding the legal system. Colonel Turnbull is married to a former Marine, now in the private sector, although they are separated; they share a son, Adam, who is a 24-year-old 1st Lieutenant. In "Legit Bad Day", she mentions that she is a third-generation Marine and her grandfather was killed during the
Battle of Belleau Wood during
World War I. In "Don and Doff", she learns that she was a candidate for promotion to
brigadier general. •
Blaise Ffrench as Sam ==Production==