Govardhan, a doctor by profession, is wrongly accused of bombing a train and is jailed by the British in Cellular Jail, also known as Kala Pani in Andaman and Nicobar Islands. He witnesses sufferings of hundreds of Indian prisoners there.
Unfortunately the movie Kaalapani is not yet available on HBO Max.
| Directing | Priyadarshan | Director |
| Writing | T Damodaran | Dialogue |
| Production | Mohanlal | Producer |
| Writing | Priyadarshan | Story |
| Editing | N. Gopalakrishnan | Editor |
| Production | R. Mohan | Co-Producer |
| Costume & Make-Up | Sajin Raghavan | Costume Design |
| Art | Sabu Cyril | Art Direction |
| Production | sachidanandan | Production Manager |
| Art | Suresh Balaje | Production Design |
| Camera | Santosh Sivan | Director of Photography |
| Sound | Deepan Chatterjee | Sound |
| Sound | Ilaiyaraaja | Original Music Composer |
| Writing | T Damodaran | Screenplay |
| Writing | Priyadarshan | Screenplay |
