Woh Kaun Thi? is a 1964 black-and-white Indian movie directed by Raj Khosla, starring Sadhana, Manoj Kumar and Prem Chopra. Though the screenplay was written by Dhruva Chatterjee, parts were later rewritten, wherein Manoj Kumar took an active role. Music by Madan Mohan was the asset of this movie. All the songs were popular, picturised nicely but expressionless face of Manoj Kumar was the weakest part of the movie. The film became a hit at the box office. Its success had Khosla directing Sadhana in two more suspense thrillers: Mera Saaya and Anita .Wikipedia