Untraceable Evidence is a Police Procedural in Hong Kong, produced by TVB. The series had two seasons.

Hoi (Deric Wan) was once a cop, but his hot temper cost him his job. He then joined a security company as the head investigator. Ching (Ng Kai Wah), Hoi’s partner in the police force, on the other hand, was always cool-minded. Though Hoi had left the force, he still worked closely with Ching and they solved many tough cases like “Killing with Arrows”, “Vanishing Art Director”, “Corpse in the Sack” and “Homicide in a Sealed Room”. Then, the two friends fell for the charming Sai (Jessica Hester Hsuan) together. Sai chose Ching after she broke up with Hoi. Hoi went back to his ex-girlfriend Man (Mok Ho Yan), but he was immediately caught up in the case “Poisonous Wedding”. Man was murdered at the wedding and Sai and Hoi were suspects…

"Detective Investigation Files" revolves around the professional and meticulous investigations carried out by a group of dedicated police officers. As they delve into mysterious deaths with unclear causes, they tirelessly work towards maintaining peace and security for the people. However, their demanding job often comes at the expense of personal happiness. Cheung Dai Yong, a brilliant and astute police officer, has a track record of solving crucial cases. His trusted colleague, Lee Chung Yee, stands by his side, and together they tackle challenging and complex cases. Amidst their work, Dai Yong encounters Ko Jit, a tenacious journalist. Despite their initial conflicts, a deepening connection blossoms between them. However, Ko Jit already has a romantic partner.

Armed Reaction is a 1998 Hong Kong modern cop drama produced by TVB. The drama stars Bobby Au-yeung and Esther Kwan as the main leads with Joyce Tang, Marco Ngai, Mimi Chu and Joe Ma in main supporting roles.