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.

• Bobby Au-Yeung
• Charmaine Sheh
• Frankie Lam
• Kevin Cheng
• Yoyo Mung Ka-Wai
• Linda Chung
• Raymond Cho Wing-Lim
• Florence Kwok