
Bomb disposal expert Ivan Yeung returns from England and happens to come across a grenade case by accident. Ivan's skills are highly appreciated by senior chemist Ko Yin-Bok and he is invited to join the Forensic Division. Meanwhile, other members of the team are caught in an explosive incident that ends up changing team dynamics.

as Ko Yin-Bok (Timothy / Tim Sir)

as Ma Kwok-Ying (Bell / Madam Ma)

as Koo Chak-Sum (Sam / Dr. Koo)

as Yeung Yat-Sing (Ivan)

as Leung Siu-Yau (Nicole / Madam Leung)

as Lam Ding-Ding

as Sum Hung

as Mok Suk-Woon (Yvonne)

as Leung Siu-Kong (Fred)

as Ling Sum-Yee (Josie)

as Lam Pui-Pui

as Mok Ching-Hong (Wilson)

as Ching Wai-Shing (Edwin)

as Fong Miu-Na (Formula)

as Cheng Lai-Ling

as Ma Kam-To

as Kwok Yee-Fan

as Ma Kwok-Wang (Ben)

as Connie

as Leung Hing-Lung

as Ko To

as Lau Tsun-Sek (Terence)