Een sergeant voelt zich schuldig nadat een auto achtervolging onschuldige slachtoffers heeft geëist. Hij is vastbesloten om de verantwoordelijke misdaadbaas voor de rechter te brengen.
Nee, helaas is 証人 nog niet beschikbaar op Netflix in Nederland.
| Production | Albert Lee Nga-Bok | Producer |
| Directing | 林超賢 | Director |
| Writing | 林超賢 | Writer |
| Production | 梁鳳英 | Producer |
| Writing | 吳煒倫 | Writer |
| Production | 張康達 | Producer |
| Costume & Make-Up | Gloria Lam Wai-Lok | Hairstylist |
| Editing | 陳祺合 | Editor |
| Costume & Make-Up | Chiu Wai-Ying | Wardrobe Master |
| Camera | 張文寶 | Director of Photography |
| Costume & Make-Up | Ma Chun-Kui | Assistant Costume Designer |
| Crew | 宋岱 | Presenter |
| Directing | Leslie Lam Pak-Wai | Second Assistant Director |
| Writing | 林超賢 | Story |
| Camera | Ho Kin-Kwong | Focus Puller |
| Camera | 謝忠道 | Director of Photography |
| Art | Jeffrey Kong | Art Direction |
| Directing | Stanley Chow Ying-Fan | Script Supervisor |
| Crew | Albert Yeung | Presenter |
| Sound | Tam Tak-Wing | Sound Recordist |
| Art | Tsoi Chi-Hei | Assistant Art Director |
| Costume & Make-Up | Chiu Wai-Ying | Costume Designer |
| Camera | Rocky Tsang Chun-Chung | Focus Puller |
| Lighting | Chan Sing-Hong | Best Boy Electrician |
| Costume & Make-Up | Middi Yau | Makeup Artist |
| Art | Yau Yui-Chit | Assistant Art Director |
| Directing | 董瑋 | Action Director |
| Crew | Chi Shui-Tim | Pyrotechnician |
| Directing | 姚敏琦 | First Assistant Director |
| Crew | 董瑋 | Choreographer |
| Production | 宋岱 | Executive Producer |
| Production | Albert Yeung | Executive Producer |
| Production | 林炳坤 | Associate Producer |
| Production | 李錦文 | Associate Producer |
| Sound | 黎允文 | Original Music Composer |
| Art | 邱偉明 | Production Design |
| Costume & Make-Up | Middi Yau | Special Effects Makeup Artist |
| Production | 區椲麟 | Production Manager |
| Production | Andrew Chan Chin-On | Assistant Production Manager |
| Crew | Ringo Chan Chak-Hin | Post Production Supervisor |
| Production | Chan Tze-Fung | Assistant Production Manager |
| Sound | David Wong | Sound Designer |
| Lighting | Chiu Hung-On | Electrician |
| Editing | Edwin Van Huizen | Digital Intermediate Colorist |
| Art | Ching Wai-Yin | Property Master |
| Art | Keith Cheung | Props |
| Art | Chan Sin-Chi | Props |
| Art | Chan Tze-Leung | Props |
| Crew | 羅禮賢 | Stunt Coordinator |
| Production | Mei-Fun Mok | Production Supervisor |
| Production | Cheung Chi-Ho | Unit Manager |
| Art | 張國偉 | Storyboard Artist |
| Camera | 陳錦泉 | Still Photographer |
| Visual Effects | Yee Kwok-Leung | Visual Effects Director |
| Visual Effects | Alex Lim Hung-Fung | Visual Effects Director |
| Visual Effects | Eric Lai Man-Chun | Visual Effects Director |
| Visual Effects | Anna Wan Chi-Yin | Visual Effects Producer |
| Sound | 聶基榮 | Sound Designer |
| Sound | 聶基榮 | Sound Re-Recording Mixer |
| Sound | Phyllis Cheng | Sound Designer |
| Sound | Ip Siu-Kei | Dialogue Editor |
| Sound | Jason Fung Seng-Hang | Dialogue Editor |
| Sound | Michael Chiu Ka-Shing | Dialogue Editor |
| Sound | Jason Fung Seng-Hang | Foley Recordist |
| Sound | David Wong | Foley Editor |
