Wikipedia
Satyakam is a 1969 Indian Hindi film directed by Hrishikesh Mukherjee, based on a Bengali novel of the same name by Narayan Sanyal. The film stars Dharmendra, Sharmila Tagore, Sanjeev Kumar, and Ashok Kumar. The music for this film is given by Laxmikant Pyarelal.
After the success of Anupama (1966), Hrishikesh Mukherjee got together the same team of actors: Dharmendra, Sharmila Tagore, David (actor); dialogue writer: Rajinder Singh Bedi; lyricist: Kaifi Azmi and cameraman: Jaywant Pathare.
This is considered to be Dharmendra's finest acting performance of his career. In addition its director Hrishikesh Mukherjee names this film as his favourite film. This speaks volumes of the film considering that the renowned director has made several memorable movies like Anand, Bawarchi, Abhimaan, Chupke Chupke and Khoobsurat.
It won 1971 Filmfare Best Dialogue Award for Rajinder Singh Bedi. The movie also won National Film Award For Best Feature Film in Hindi. The film was remade in Tamil as Punnagai (1971) by K. Balachander.