Main cast •
Ruco Chan as Kiu Tin-seng (;
Kiu Tinsang) — also known as Sam. Independent, clever, and talented, Sam is a distinguished police officer for the
Royal Hong Kong Police Force, taking him only five years to get promoted from the sergeant rank to the chief inspector rank. Sam is Chow Yuk-mui's eldest son, sired by Kiu Sum, who is also a Hong Kong police officer. Rejected by his biological father, Sam suffers through a tremendously difficult childhood and is emancipated by his parents at an early age. Sam is regarded as the serial's main tragic hero. Though he is innately a good-hearted person, his tragic flaws—ambition and greed—eventually leads to his downfall by the end of the story. ''Brother's Keeper'' is Chan's sixth collaboration with producer Wong. His breakout performance in Wong's 2011 TVB legal drama
The Other Truth—his third collaboration with Wong—was what led Wong to cast Chan as the lead actor for most of her newer works. Chan expressed that he has high expectations for the serial and compares its time-lapsing scope to the likes of critically successful dramas such as
The Greed of Man and
Vanity Fair. •
Linda Chung as Rachel Cheuk (;
Ceok Zing) — Sam's girlfriend. Rachel is the second daughter of Lau Lai-kuen, who is the second wife of the wealthy Philip Cheuk. Despite her parents' objections, Rachel insists to date Sam. With Sam's help, Rachel eventually fulfills her dream of owning her own fashion boutiques to sell her own brand designs. She was involved in love triangle with Sam and Son for more than 20 years. Wong had been wanting to work with Chung ever since she started production on her 2012 comedy,
No Good Either Way in late 2011. Chung was one of the first cast members of ''Brother's Keeper'' that was announced in mid-2012. On her role, Chung said, "The role grew up overseas, so I naturally get to speak English! I grew up in Canada as well... speaking English dialogue is a very comfortable feeling for me." •
Edwin Siu as Lo Wai-shun (;
Lo Waiseon) — Sam's younger half-brother. The younger son of Chow Yuk-mui, Shun is sole offspring of Mui's only marriage with Lo Fu-shing. Due to his father's poor business, Shun spends most of his time in the streets of Macau to handle his own
peanut brittle vendor business. Resourceful, persistent, and confident, Shun's small mobile food business eventually expands to a large multi-chained bakery shop, the Pasterilia Lo Son Kei. The simple-minded Shun serves as a foil to Sam's guileful character. Shun's story from rags to riches is also inspired by the real-life story of Leong Chan-kuong, the owner of Macau's most famous bakery shop, Koi Kei
Moses Chan was originally cast for the role of Shun, which was announced simultaneously with Ruco Chan's casting in the late summer of 2012. In August 2012, approximately a month before the serial was to commence shooting in Hong Kong, Chan was reassigned to play opposite
Wayne Lai in TVB's legal drama,
Will Power. After Siu replaced Chan, the character of Shun was rewritten to be younger. •
Kristal Tin as Yiu Man-ying (;
Jiu Manjing) — nicknamed Chang-kai Ying (; literally "Shrewish Ying"); Son's best friend. Peevish, boyish, but loyal, Ying is one of Shun's closest childhood friends. Ying falls in love with Shun and is a major supporter in Shun's quest to open up his multi-chain business. •
Louis Yuen as Lung Fei (;
Lung Fei) — nicknamed Young Master Lung (); Son and Ying's best friend. Educated overseas, Lung hails from a wealthy family in Macau, and is the heir of his family business, although he prefers to work as an insurance sales agent. Despite his family business being one of the biggest rivals of Pasterilia Lo Son Kei, Fei and Son are best friends. Fei has an obvious crush on Ying, but he is supportive when Ying begins to date Son. •
Louise Lee as Chow Yuk-mui (;
jyutping:
Zau Jukmui) — Sam and Shun's mother. Mui gave birth to her first-born, Kiu Tin-seng, in Hong Kong during the late 1960s. Kiu Sum, her son's policeman father, refuses to marry Mui after their son's birth, and in a blaze of anger, Mui destroys her son's Hong Kong birth certificate and moves back to her hometown in
Foshan, China. There, she meets her husband, Lo Fu-shing, and gives birth to Shing's only son, Lo Wai-shun. In 1980, Mui and her family attempt to sneak across the Hong Kong borders to escape mainland China's tumultuous social unrest, but the family is separated by external forces. Mui, Shing, and Shun land in Macau, while Sam lands in Hong Kong.
Recurring cast •
Louis Cheung as Keung Yung (;
Goeng Jung) — a
triad leader who strikes an ambiguous friendship with Sam. •
Lau Kong as Lo Fu-shing (;
Lo Fusing) — Son's father and Mui's only husband, whom she met in Foshan. Shing owns a struggling peanut brittle shop in Macau. •
Susan Tse as Lau Lai-kuen (;
Lau Laigyun) — Rachel's mother, the second wife of Philip Cheuk. •
Leanne Li as Emily Cheuk (;
Coek Ning) — Rachel's older sister. •
Henry Yu as Philip Cheuk (;
Ceok Jatfaan) — Rachel and Emily's father. •
Becky Lee as Inspector Mandy Yeung (;
Joeng Maanzi) — Sam's best friend. •
Ankie Beilke as Michelle Fabio — one of Sam's love interests. Ankie is attracted to Sam and attempts to seduce him. Eyeing Fabio's wealth and power, Sam eventually gives in to her seduction. •
Joseph Lee as Kiu Sum (;
Kiu Sam) — Sam's father, a Hong Kong police officer. Sum does not wish to acknowledge his relationship with Sam in public, which indirectly influenced Sam's decision to become a cop. •
Stephen Wong as Kiu Wai-kin (;
Kiu Waigin) — also known as Kim, Sum's second son and Sam's younger half-brother. •
Chun Wong as Yiu Han (;
Jiu Hang) and
Ho Yuen-tung as Yiu Ho-nam (;
Jiu Hounaam) — respectively Ying's father and Ying's younger brother. •
Yue Chi-ming as Lung Kwong-kam (;
Lung Gwonggaam) and
Angelina Lo as Yuen Shuk-ngo (;
Jyun Sukngo) — Fei's parents. •
Timothy Cheng as Chief Inspector Wong Kam-ho (;
Wong Gaamhou) — also known as K.O. Sir, Sam's mentor and Sum's biggest rival. •
Rosanne Lui as Lee Wai-bing (;
Lei Waibing) — Sum's wife and Kim's mother. ==Reception==