G.D. Naidu overcomes challenges and defies a repressive colonial regime to become one of India's greatest innovators.
| Actor | Role |
|---|---|
 R. MadhavanGD Naidu | GD Naidu |
 PriyamaniChellammal | Chellammal |
 SathyarajRamaiah Pillai | Ramaiah Pillai |
 JayaramAmbalapara Krishnan | Ambalapara Krishnan |
 Dushara VijayanRanganayaki | Ranganayaki |
 Abdool LeeChidambaram | Chidambaram |
 Thambi RamaiahRamasamy Mama | Ramasamy Mama |
 Vinay RaiBhupendra | Bhupendra |
 Ramesh ThilakNot listed | Not listed |
 KarunakaranPerunkili | Perunkili |
 Aditi BalanPadmavathi | Padmavathi |
 John VijayNot listed | Not listed |
 Yogi BabuNot listed | Not listed |
| MMuralidaranMurali | Murali |
| NNandalalNot listed | Not listed |
 TeejayYoung G.D.N | Young G.D.N |
 Mohan RamanNot listed | Not listed |
| RRichard Bhakti KleinRobert Stanes | Robert Stanes |
| CCarl Andrew HarteHenry Adams | Henry Adams |
 KanihaNot listed | Not listed |
 Sheela RajkumarYoung Chellamal | Young Chellamal |
 NandhuAchudhan | Achudhan |
 Jenson DhivakarVellaiyan | Vellaiyan |
 Brigida SagaDeivanai | Deivanai |
 Vijay YesudasPeriyar | Periyar |
 ShafnaNot listed | Not listed |