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 |
| Production | Mohanlal | Producer |
| Production | R. Mohan | Co-Producer |
| Writing | Priyadarshan | Story |
| Camera | Santosh Sivan | Director of Photography |
| Editing | N. Gopalakrishnan | Editor |
| Art | Suresh Balaje | Production Design |
| Production | sachidanandan | Production Manager |
| Costume & Make-Up | Sajin Raghavan | Costume Design |
| Writing | T Damodaran | Dialogue |
| Art | Sabu Cyril | Art Direction |
| Sound | Ilaiyaraaja | Original Music Composer |
| Sound | Deepan Chatterjee | Sound |
| Writing | T Damodaran | Screenplay |
| Writing | Priyadarshan | Screenplay |
