Originally the script of this movie was of Filmmaker Prakash Mehra. Dharmendra had the script of Zanjeer. So both of them stuck a deal and exchanged the script. Dharmendra when he got the script of Kahani Kismat, he gave it to his Godfather Arjun Hingorani to make the movie and instead Dharmendra preferred to work with Prakash Mehra in Samadhi as he found Samadhi is better than Zanjeer.
One of Rekha's earlier movie.
For more than 40 years now the song are rafta rafta is still wanted and famous.
In the song Rafta Rafta the words Maine Aisa Toh Nahi Kaha Tha were uttered by Usha Timothy.
Dharmendra an Rekha were also part of the re created version of Rafta Rafta in Yamla Pagla Deewana Phir Se 2018.