A few individuals in the medical profession are murdered or kidnapped, and the cop investigating the case suspects a doctor and arrests him. But is he the one who is behind these crimes? And why are they being committed?
You can now watch Mersal online on the following streaming providers in the United States.
| Directing | Atlee | Director |
| Writing | Ramana Girivasan | Dialogue |
| Writing | Ramana Girivasan | Screenplay |
| Writing | Vijayendra Prasad | Screenplay |
| Writing | Atlee | Dialogue |
| Sound | A.R. Rahman | Original Music Composer |
| Camera | G. K. Vishnu | Director of Photography |
| Editing | Antony L. Ruben | Editor |
| Directing | T K Madhan Prasad | Co-Director |
| Production | Hema Rukmani | Producer |
| Production | H Murali | Executive Producer |
| Sound | Tapas Nayak | Sound Designer |
| Art | T. Muthuraj | Art Direction |
| Crew | M. Sherif | Choreographer |
| Crew | Prem Rakshith | Choreographer |
| Costume & Make-Up | Neeraja Kona | Costume Design |
| Costume & Make-Up | Pallavi Singh | Costume Design |
| Crew | ANL Arasu | Stunt Coordinator |
| Directing | Shilpi Kiran | Assistant Director |
| Production | Natarajan Ramji | Line Producer |
| Production | Marcin Andruchow | Line Producer |
| Crew | R Udhayakumar | Production Controller |
| Camera | D Maneksha | Still Photographer |
| Production | Gopi Prasannaa | Publicist |
| Production | N. Ramasamy | Producer |
| Production | M. Senthil | Production Executive |
| Writing | Vivek | Lyricist |
| Sound | Kailash Kher | Playback Singer |
| Sound | Sathyaprakash Dharmar | Playback Singer |
| Sound | Deepak Blue | Playback Singer |
| Sound | Pooja Vaidyanath | Playback Singer |
| Sound | A.R. Rahman | Playback Singer |
| Sound | Shreya Ghoshal | Playback Singer |
| Sound | Sid Sriram | Playback Singer |
| Sound | Shweta Mohan | Playback Singer |
| Sound | G. V. Prakash Kumar | Playback Singer |
| Sound | Naresh Iyer | Playback Singer |
| Sound | Sharanya Srinivas | Playback Singer |
| Sound | Vishwaprasad Ganagi | Playback Singer |
| Writing | Atlee | Story |
| Writing | Atlee | Screenplay |
