Nayanthara starrer O2 review and rating‘O2 (Oxygen Telugu)’ Cast and Crew CAST- Nayanthara, Ritwik, Rishikanth, Sha Raa, Barath Neelakantan DIRECTOR- GS Viknesh LANGUAGE- Tamil ‘O2 (Oxygen Telugu)’ Review Director Viknesh’s ‘O2 (Oxygen)’ is a well-made, connecting thrill ride that keeps you snared from beginning to end. The story starts off in an unassuming fashion but soon turns into an intense []