Cast of The Expanse

Steven Strait portrays Jim Holden, the captain of the Rocinante and a former member of the United Nations Navy. Holden becomes embroiled in interplanetary conflicts as he uncovers a conspiracy that could change the course of humanity.

Dominique Tipper plays Naomi Nagata, the Rocinante's engineer and second-in-command. Naomi is resourceful and skilled, often finding solutions to complex problems when the crew faces challenges.

Cas Anvar portrays Alex Kamal, the Rocinante's pilot and an expert in Martian military tactics. Alex is a talented and dedicated crew member, juggling his responsibilities and loyalty to his team.

Wes Chatham plays Amos Burton, the Rocinante's mechanic and enforcer. Amos is a complex character with a troubled past, bringing a sense of loyalty and ruthlessness to the crew.

Shohreh Aghdashloo portrays Chrisjen Avasarala, a United Nations executive with a strong political presence. Avasarala is dedicated to maintaining peace and order but is willing to take drastic measures when necessary.

Frankie Adams plays Roberta 'Bobbie' W. Draper, a Martian Marine and later a member of the Rocinante crew. Bobbie is a fierce soldier who becomes entangled in interplanetary conflicts and plays a key role in uncovering hidden truths.

Shawn Doyle portrays Sadavir Errinwright, a high-ranking official in Earth's government. Errinwright is a cunning and manipulative character who plays a crucial role in shaping political decisions and agendas.

Florence Faivre plays Julie Mao, a wealthy heiress who becomes involved in a mysterious conspiracy. Julie's disappearance sets off a chain of events that lead to the discovery of a dangerous alien technology.