A reporter and the producer of "Horror Hotline", a popular radio call-in show, investigate a caller's tale about a terrifying mutant infant that caused several deaths in the 1960s and seems to be making people disappear today.
Unfortunately the movie Horror Hotline... Big Head Monster is not yet available on HBO Max.
| Directing | Soi Cheang | Director |
| Writing | Soi Cheang | Writer |
| Writing | Sunny Chan Wing-Sun | Writer |
| Directing | Danny Wong Hing-Fun | Assistant Director |
| Directing | Mak Yuk-Kwan | Assistant Director |
| Directing | Mak Yuk-Kwan | Script Supervisor |
| Camera | Ko Chiu-Lam | Director of Photography |
| Camera | Yuen Chun-Wah | Focus Puller |
| Lighting | Dick Tung Wai-Keung | Gaffer |
| Art | Wilson Lam Wai-Sum | Art Direction |
| Costume & Make-Up | Lorraine Lau Yuet-Fan | Costume Designer |
| Costume & Make-Up | Tse Chuen-Tung | Wardrobe Supervisor |
| Costume & Make-Up | Midco Chu Wai-Fong | Makeup Artist |
| Editing | Angie Lam On-Yee | Editor |
| Art | Andy Au Wing-Kei | Property Master |
| Sound | Bernard Chin Wing-Lai | Sound Mixer |
| Sound | Koo Lai-Yip | Original Music Composer |
| Production | Wai But Tang | Production Manager |
| Production | Ram Ling Chi-Man | Assistant Production Manager |
| Production | Fung Chi-Wai | Unit Manager |
| Camera | Wong Chi-Kuen | Still Photographer |