Alok Nath made his debut in the film industry with the movie Gandhi in 1982. Later he did Kamagni as the lead actor. In 1984 he appeared in three movies, Aaj ki Aawaaz, Mashaal and Saaransh whereas in 1985 he featured in Apna Jahan and Faasle. In 1987, he did Zevar, Marte Dam Tak, Kacchi kali and Yeh Woh Manzil Toh Nahin. In 1988, he appeared in six movies, Agnee,Dayawan,Qayamat se Qayamat Tak,Kabzaa,Hamara Khandaan and Trishagni. In 1989, he appeared in the box office success Maine Pyaar Kiya portraying father to the actress. Also he did Suryaa, Joshilay, Anjaan Rishte and Kasam Suhaag ki the same year. In the year 1990, he appeared in Agneepath, CID, Lekin, Dushman, Hatimtai and Shadyantra. Later in 1991 he appeared in Phool Bane Angaare, Aayi Milan Ki Raat, Khel, Pyaar Bhara Dil, Jamai Raja and Vishnu Deva. In the year 1992, he featured in eleven movies including Tirangaa, Bol Radha Bol, Sapne Sajan Ke, Police Aur Mujrim, Naseebwala,Shola Aur Shabnam, Vishwatma, Meera Ka Mohan, Sahebzaada and Deewana. In 1993 he did Game, Anth, Antim Nyay, Divya Shakti, Tara, Sainik, Chor Aur Chaand, Shri Krishna Bhakt Narsi and Dil Hai Betaab. In 1994, he gained a fatherly image from the multistarrer film Hum Aapke Hai Koun. The same year, he also appeared in Eena Meena Deeka, Zamane se kya darna, Chauraha, Insaniyat, Kanoon, Laadla, Sangdil Sanam, Saajan Ka Ghar, Zaalim, Gangster and Mr. Asaad. In 1995, Ravan raaj, Gaddar, Hum Dono, Hathkadi, Kartavya, Sidhi and Ram shastra were the films ge featured in. The later year 1996, he appeared in Rakshak,Hahakar, Papa Kehte Hain, Vijeta, Ek Tha Raaja, Agni Sakshi, Mahir, Jeet and Zordar. In 1997, the movies featuring Alok Nath were Pardes, Ghoongat, Jeevan Yudh, Kaun Saccha Kaun Jhoota, Dil Kitna Nadaan hai and Insaaf The Final Justice whereas in 1998 he appeared in Hum Saath Saath Hain We Stand United, Kabhi Na Kabhi, Tirchi Topiwale, Vinashak and Bada Din. His movies in 1999 were Taal, Aa Ab Laut Chalein and Pyaar Koi Khel Nahi and in 2000 were Khiladi 420, Le Chal Apne Sang and Aaghaaz. In 2001, Alok Nath appeared in Kabhi Khushi Kabhi Gham, Ek Rishta The Bond of Love, Mujhe Kuch Kehna Hain, Uljhan and Hum Deewane Pyaar ke. In the next year 2002, he appeared in Rishtey, Jeena Sirf Mere Liye, Dil hai Tumhara, Mere Yaar Ki Shaadi Hai, Na Tum Jaano Na hum, Hum Tumhare Hain Sanam, Aap Mujhe Acche Lagne Lage, , Ansh The Deadly Part and Tumko Na Bhool Payenge. In 2003 Jai Santoshi Maa, Dabdaba and Kaise Kahun Ki Pyaar Hain were his films. In 2004 he appeared in Ishq Hai Teri Tumse and 30 days whereas in 2005 Police force an inside story, Bhola in Bollywood, That game of chess, Mohabbat Ho Gayi Hai Tumse, Tango Charlie and Zameer the fire within. In 2006, he featured in Vivaah, Mere jeevansathi and Sab Kuch hai Kuch Bhi Nahi whereas in 2007 he appeared in Aur Pappu Pass Ho Gaya and Sirf Romance Love by chance.In 2008 he appeared in Ek Vivah Aisa Bhi and Mukhbir.Alok Nath did his soap opera debut in 1986 from Buniyaad. Buniyaad was a big milestone in his career. In1999 he appeared in Rishtey that aired till 2001.He also appeared in Kabhie Kabhie, Talaash, Tala ,Imtihaan, Astitva Ek Prem Kahaani, Kuch Toh Log Kahenge, Tu mere Agal Bagal hai, Ye Rishta Kya Kehlata hai, Wo Rehnewali Mehlo Ki, Ghar ek Sapna,Har Ghar Kuch Kehta hai, Bidaai, Yahan Main Ghar Ghar Kheli, Do dil Bandhe Ek Dor se and Mere Rang Mein Rangnewali.