Main •
Andrew Koji as Ah Sahm, a Chinese martial arts expert from
Foshan who travels to
San Francisco in search of his elder sister, Xiaojing, who emigrated years prior. •
Olivia Cheng as
Ah Toy, a
madam who runs a brothel in Chinatown and is adept at wielding the
dao. •
Chen Tang as Hong (seasons 2–3), an abrasive, young new recruit brought over from China as part of reinforcements for the Hop Wei. He quickly befriends Young Jun and Ah Sahm when they come to his defense after he is ridiculed for being homosexual. He often fights with a chain that he wears as a necklace. •
Mark Dacascos as Kong Pak (season 3), the former leader of the Jiang Yao Tong, which is assimilated into the Long Zii, and an old friend of Li Yong.
Recurring • Rich Ting as Bolo (season 1), a former railroad worker ("
coolie") turned underground fighter who was saved by Father Jun. He serves as the Hop Wei's primary muscle and assassin. •
Henry Yuk as Long Zii (season 1), the elderly leader of the Long Zii tong and Mai Ling's husband. • Robert Hobbs as Stone, a police officer under Bill's command as part of the Chinatown Squad. • Jacques Bessenger as McLeod (seasons 1–2), another of the police officers in the Chinatown Squad. • Nicholas Pauling as Harrison, another of the police officers in the Chinatown Squad. • David Butler as Russell Flanagan (seasons 1–2), San Francisco's chief of police. • Graham Hopkins as Byron Mercer (season 1), Penelope and Sophie's father and the owner of a
steel mill. • Kenneth Fok as Jacob (seasons 1–2), Penelope's loyal Chinese manservant. • Emily Child as Lucy O'Hara, Bill's wife and mother of their children. • Brendan Sean Murray as Jack Damon (season 1), an Irish debt collector working for the Fung Hai. • Jenny Umbhau as Lai, a young girl from the
Shandong province who aids Ah Toy on her missions. Like Ah Toy, she is skilled with the dao. • André Jacobs as Lymon Merriweather (season 2; guest seasons 1, 3), a wealthy businessman who frequently deals with the Mayor. • Martin Munro as Leonard Raice (season 2; guest seasons 1, 3), a corrupt reporter with ties to Buckley. •
Frank Rautenbach as Leonard Patterson (season 2; guest season 1), Ah Toy's business partner who serves as her frontman when purchasing land • Gaosi Raditholo as Abigail (season 3; guest season 2), an
African American bartender who seduces and drugs Lee, and becomes romantically involved with him later on. • Raditholo also plays Nora (seasons 1–2), Lee's deceased lover from Georgia. • Nat Ramabulana as "Happy Jack" (season 3; guest season 2), the African American leader of a drug trafficking ring on the Barbary Coast who enters into a partnership with Young Jun and Ah Sahm. • Neels Clasen as Benjamin Atwood (season 3), the ruthless new police chief from
New York City and a former Union Army Colonel. •
Sean-Marco Vorster as Stewart Gumm (season 3), Buckley's conniving campaign manager and right-hand man. • Jazzara Jaslyn as Eliza Pendleton (season 3), a wealthy
socialite who befriends Mai Ling. • Kevin Otto as Horace Clark (season 3), Bill's brother-in-law who owns a successful cement factory. • Gary Young as Yichèn (season 3), Yan Mi's sick father and the owner of a printing shop who is in debt with the Hop Wei. • Angelo Chen as Zimo (season 3), Yan Mi's brother who works with his father in a printing shop. • Nick Cordileone as Edmund Moseley (season 3), a special agent in the
Secret Service tasked with hunting down stolen
printing plates. •
Telly Leung as Marcel (season 3), a nightclub singer who Hong becomes enamoured with. •
Colin Moss as Franklin Thayer (season 3), Buckley's political rival in the San Francisco mayoral campaign. • Dominique Maher as Catherine Archer (season 3), a political
booster who seeks to support Buckley's campaign. • Sizo Mahlangu as Isaac (season 3), Happy Jack's right-hand man.
Guest • Christiaan Schoombie as Harlan French (season 1), the leader of a gang of bandits. •
C. S. Lee as Lu (season 1), a former coolie and co-owner of a saloon that Ah Sahm and Young Jun take shelter in. • Erica Wessels as Billie (season 1), Lu's wife and co-owner of their saloon. • Andrew Stock as Father Flynn (season 1), a priest who helps defend Lu's saloon from bandits. • Rachel Colwell as Wankeia (season 1), a
Native American prostitute Young Jun falls in love with. •
Patrick Baladi as Robert Crestwood (seasons 1–2), an anti-Chinese Senator who seeks to become president. • Lim Yu-Beng as Zan (season 1), a slaver who sells Lai to Ah Toy. • Henry Kwok as Lao Ting (season 1), a Chinese businessman who ships people from China to the US. •
James Lew as Li Qiang (season 1), a
kung fu Sifu who trained Ah Sahm in his youth. • Michelle Allen as Claire (season 2), a prostitute and the mother of Wang Chao's illegitimate daughter. •
Emmanuel Castis as Clyde Nichols (seasons 2–3), an ex-
Pinkerton agent hired by Mai Ling to gather information on Buckley. • Paolo Wilken as Lao Che (season 2), the leader of the low-level Suey Sing Tong. •
Conor Mullen as Elijah Rooker (season 2), a rich business tycoon and owner of Rooker's Mill, a border town where he hosts fighting tournaments. •
Michael Bisping as Dolph Jagger (season 2), an aggressive fighter who participates in the tournament at Rooker's Mill. •
Maria Elisa Camargo as Marisol Rooker (season 2), Elijah's wife and, secretly, Rosalita's sister. •
Christos Vasilopoulos as Smits (season 2), Rooker's head of security. • Brad Kelly as "Cleaver" (season 2), one half of a hitman duo that Patterson hires to kill Ah Toy. • Jason William Day as "Hammer" (season 2), the other half of the hitman duo that Patterson hires. • Patrick Buchanan as Tully (season 2), an Irishman who leads an angry mob on a rampage in Chinatown. • Trevor Ou Tim as Wu Jin (season 3), one of the elder councilmen in the Long Zi. • Morné Visser as Killy Donahue (season 3), the father of Conor and Garrett who asks Leary to bail out his sons. • Matthew Vey as Conor Donahue (season 3), a young Irish worker, who gets into trouble with his brother. • Ross van der Walt as Garrett Donahue (season 3), a young Irish worker and Conor's brother. • Brett Chan as Muchen (season 3), the leader of the low-level Three Brothers Tong, who refuses to assimilate into the Long Zii. • Jandre Le Roux as Shaw (season 3), Strickland's bodyguard and right-hand man. • Armand Aucamp as Bernard Pendleton (season 3), Eliza's rich husband who works for the
Bank of California. • Chris Mark as Sicheng (season 3), a Chinese immigrant held for deportation, whom Young Jun has an encounter with. •
Charlie Bouguenon as Lukas (season 3), a German gangster and an old associate of Father Jun who uses Chinese labor to harvest silver. • Francois Coetzee as Christoph (season 3), Lukas's brother and vicious right-hand man. •
Shannon Lee as Wen (season 3), a Chinese laborer in Lukas's camp along with her son. •
Sven Ruygrok as Carter (season 3), Lee's kindhearted cousin. • Julian Place as Bo (season 3), Lee's vengeful cousin. • Patricia Boyer as Violet (season 3), Lee's aunt who seeks vengeance from him for killing her sons. •
Jason Wong as Ming Yu (season 3), the owner of a brothel under Long Zi protection, who wants to regain his prostitutes who were previously liberated by Nellie. ==Episodes==