Eye in the Sky (TV series)

• Kevin Cheng as Szeto Shun (司徒舜; Sitou Seon)

Known as Szeto Sir, a former CID inspector who was forced to resign from the police force after becoming a suspect in an arson case. After leaving the force, he is hired by Kong Wui-hoi to be the security manager of his luxury Y Suite Hotel.

• Ruco Chan as Cheng Nik-hang (鄭力行; Zeng Likhang)

Known as Ah Lik, a seasoned criminal whose mysterious past is linked to Szeto Shun.

• Tavia Yeung as Jan Ng Chun-ni (吳珍妮; Ng Zannei)

A private investigator with eidetic memory.

• Samantha Ko as Agatha "Ah Fa" Lam (藍菱; Laam Ling)

Jan's wealthy friend and a private investigator who formerly worked for Jan's father. Unsatisfied with how her boss treats his employees she later opens her own investigation firm and has Jan work for her.

• Even Chan as Didi
• Tsz Mei Chu as Chiu Ying-wan (趙英雲; Ziu Jingwan)
• Shally Tsang as Dai Ciu (戴超; Doi Chiu)

• Tony Hung as Tai Fu-lung (戴富龍; Doi Fulung)

Nik-hang's accomplice and childhood friend. He also goes by the name "Terry".

• Suet Nei as Grandma Mui (梅婆; Mui Po)

Tai Fu-lung's loving grandmother. She takes Cheng Nik-hang into her home after seeing him begging in the streets. She is aware of Cheng Nik-hang's real identity and tries to hide it.

• Law Lok-lam as Szeto Kwok-keung (司徒國強)

Szeto Shun's father. He is a driving instructor.

• Angelina Lo as Leung Mei-dak (梁美德)

Szeto Shun's mother. She is a television cooking show host.

• Henry Yu as Ng Chor-chi (吳佐治)

Jan's father and owner of the private detective firm named after himself. He treats his workers selfishly. When Agatha opens her own private investigation firm he loses significant business and has to resort to changing partial of his office to an internet cafe.

• Tyson Chak as Ngai Fu-gwai (倪富貴)

Ng Chor-chi's personal assistant.

• Becky Lee as Superintendent Anson Chik (戚令儀; Cik Lingji)

Szeto's former superior.

• Rosina Lam as Scarlett Wong (黃雅晴; Wong Ngaacing)

A CID detective and Szeto's loyal assistant who helps him find the true perpetrator in the arson case.

• Hero Yuen as Wheel Lee (李兆倫; Lee Siulin)
• Lam King Kong as Tse Ting-long (謝正朗)
• Man Yeung as Kwok Wing-yin (郭永賢)
• Chan Wing-chun as Ching Gwok-chung (程國忠)

• Lau Kong as Kong Wui-hoi (江匯海; Kong Wuihoi)

The blind CEO of Yat Ming Hin Hotel Corp. He has connections with the underworld.

• Willie Wai as Charles Kong (江明威; Kong Mingwai)

Szeto's superior and Kong Wui-hoi's nephew. He uses nepotism to wield his power in the hotel and hates Szeto Shun for not follow through his orders that is not work related.

• Raymond Tsang as Chun (泉; Cyun)

Kong Wui-hoi's personal assistant and chauffeur. He is Wui-hoi's only employee that is aware of his criminal past.

• Derek Wong as Manager

The manager in charge of the Hotel cafe.

• Jonathan Cheung as Fate Fan (范飛; Faan Fei)

A security guard at Y Suite Hotel. He is an opportunist who likes to suck up to Charles Kong.

• Barry Cox as Hung Chun-ying (洪俊英)

A security guard at the hotel.

• Calvin Wai as Chan Wing-ho (陳永豪)

A security guard at the hotel.

• Moses Cheng as Chung Yiu (鍾耀)

A security guard at the hotel.

• Tony Yee as Chan Bal (陳波)

A security guard at the hotel. He is later fired when he tries to get Kwok Hoi-yiu evicted from the hotel.

• Kelvin Chan as Chu Chi-gin (朱志堅)

A security guard at the hotel hired by Kong Wui-hoi to kill Kwok Hoi-yiu.

• Celine Ma as Chu Lau-si (朱露絲)

The housekeeping manager at Y Suite Hotel. She and Charles Kong are the only two employees that has access to Kong Wui-hoi's private suite in the hotel.

• Janice Shum as Ng Sau-mei (伍秀媚)

A housekeeper at the hotel.

• Judy Tsang as Choi Wai-gwan (蔡慧君)

A housekeeper at the hotel.

• GoGo Cheung as Ding Siu-kau (丁小喬)

A housekeeper at the hotel.

• Fanny Ip as Carly Chan (沈佳莉; Chan Gailei)

The lobby manager at Y Suite Hotel.

• Mikako Leung as Jenny

A receptionist at the hotel lobby.

• Ip Ting-chi as Wing

A receptionist at the hotel lobby.

• Susan Tse as Kwok Hoi-yiu (郭凱瑤; Gwok Hoijiu)

A has-been romantic novelist and resident at the Hotel who lives with her pet dog "Capital". She is snobbish and treats all the employees at the hotel poorly.

• Vivien Yeo as Hon San (韓晨)

A mysterious woman with a shady profile.

• Mandy Lam as Mrs. Chin (錢太; Cin Taai)

A wealthy socialite who invites cooks to her suite weekly to cook her a meal.

• Ngai Wai-man as Mr. Chin (錢生; Cin Saang)

A wealthy businessman who thinks his wife is cheating on him.

• Leo Tsang as Mr. Ma (馬生; Ma Saang)

A hotel guest raising and trying to sell a endangered Chinese giant salamander on the black market.

• King Kong as Chiu Kwok-hung (趙國熊)

A Taiwanese triad boss who Cheng Nik-hang hires Jan to trail. He holds Tai Fu-lung captive because he had a fling with his women.

• Jade Leung as Chow Cheng-man (周靜雯)

A former celebrity and Szeto Shun's high school classmate whom he has feelings for.

• Helena Law as Ho Ye-gu (何二姑)

The nurse who stole and sold Cheng Nik-hang during his birth.

• Gloria Chan as Yuen Ka-wai (阮嘉慧)

A delinquent girl kidnapped by a psychotic killer.

• Kiko Leung as Chung Sao-kei (鍾秀琪)

A delinquent girl who becomes the psychotic killer's latest victim.

• Ceci So as Lee Lei-han (李麗嫻)

A mother unable to accept the death of her unruly daughter, she kidnaps delinquent girls as a way to reform them.

• Brian Burrell as Mr.Pittman

A crime lord Cheng Nik-hang and Tai Fu-lung double crossed in the Philippines.

• Choi Kwok-Hing as Wu Gum-yu (胡金耀; Wu Gamjiu)

Kong Wui-hoi's former criminal accomplice who has also become a wealthy man.

• Babe Tree as Lia

An Indonesian business women who schemes with her boyfriend Ngai Fu-gwai to swindle Ng Chor-chi out of his home and business.

The following is a table that includes a list of the total ratings points based on television viewership. "Viewers in millions" refers to the number of people, derived from TVB Jade ratings (including TVB HD Jade), in Hong Kong who watched the episode live. The peak number of viewers are in brackets.