The film was originally titled Kaun Hain Khooni. Due to the film not being sold, the producers changed the title for suspense feeling.

Shashi Kapoor & Moushumi Chatterjee did a film Anari in 1975. A song from that film was edited out from the final cut. The song was a part of Anari's released LP record also. Years later the producer of Kaun Hai Khooni added that song to this film to add star value. Thus, Shashi Kapoor & Moushumi Chatterjee making a special appearance in the film.

Mahesh Anand's dancing silhouette that was used in Sanam Tere Kasam,Karishmaa, and Tan Badan was used again in the title sequence of the film.

Mahesh Anand's dancing silhouette from Sanam Tere Kasam and Karishmaa was used in title sequence of the dubbed Hindi movie "Badle Ki Jwala" in 1986.