Plot: After PO-TI and KIN-PAK failed to capture TUNG-HING and his co-conspirators in one fell swoop, KIN-PAK proposes getting an undercover to disguise as a drug dealer, so HOK-LIK offers himself to take up the mission. TIN-LAM and JO-JAN conduct assessments of all trainees, in the hope of cherry-picking one to assist Sr Prosecutor CHAN in the court hearing