Description: 一次行動，CIB高級督察卓凱的五位臥底及一位好友先後喪命，遂與新紮臥底鄭淑梅展開拯救臥底的行動。另一邊廂，長興新任龍頭魏德信整頓組織，頭目覃歡喜另起爐灶，命名「福和」，與德信對抗。卓凱派淑梅混入長興，與德信的手下施嘉莉、徐天堂及歡喜的得力助手樂少鋒交手。卓凱發覺德信背後有黑警支持，決心把德信的惡勢力連根拔起。德信拼死反撲，將一眾臥底列入「必殺」名單！
Language: Cantonese
Production company(s): TVB
Country: Hong Kong
Times: 30 Episodes
Release Date: 18 September 2017
Cast: Michael Miu, Benz Hui, Moses Chan, Jessica Hsuan, Benjamin Yuen, Chau Pak-ho, Priscilla Wong, Alice Chan
- Line Walker: The Prelude – 使徒行者2 – Episode 30
- Line Walker: The Prelude – 使徒行者2 – Episode 29
- Line Walker: The Prelude – 使徒行者2 – Episode 28
- Line Walker: The Prelude – 使徒行者2 – Episode 27
- Line Walker: The Prelude – 使徒行者2 – Episode 26
- Line Walker: The Prelude – 使徒行者2 – Episode 25
- Line Walker: The Prelude – 使徒行者2 – Episode 24
- Line Walker: The Prelude – 使徒行者2 – Episode 23
- Line Walker: The Prelude – 使徒行者2 – Episode 22
- Line Walker: The Prelude – 使徒行者2 – Episode 21
- Line Walker: The Prelude – 使徒行者2 – Episode 20
- Line Walker: The Prelude – 使徒行者2 – Episode 19
- Line Walker: The Prelude – 使徒行者2 – Episode 18
- Line Walker: The Prelude – 使徒行者2 – Episode 17
- Line Walker: The Prelude – 使徒行者2 – Episode 16
- Line Walker: The Prelude – 使徒行者2 – Episode 15
- Line Walker: The Prelude – 使徒行者2 – Episode 14
- Line Walker: The Prelude – 使徒行者2 – Episode 13
- Line Walker: The Prelude – 使徒行者2 – Episode 12
- Line Walker: The Prelude – 使徒行者2 – Episode 11
- Line Walker: The Prelude – 使徒行者2 – Episode 10
- Line Walker: The Prelude – 使徒行者2 – Episode 09
- Line Walker: The Prelude – 使徒行者2 – Episode 08
- Line Walker: The Prelude – 使徒行者2 – Episode 07
- Line Walker: The Prelude – 使徒行者2 – Episode 06
- Line Walker: The Prelude – 使徒行者2 – Episode 05
- Line Walker: The Prelude – 使徒行者2 – Episode 04
- Line Walker: The Prelude – 使徒行者2 – Episode 03
- Line Walker: The Prelude – 使徒行者2 – Episode 02
- Line Walker: The Prelude – 使徒行者2 – Episode 01
- Line Walker: The Prelude – 使徒行者2
- Line Walker: The Prelude – 使徒行者2 – Confidential
