Insaan, which featured Dharmendra and Saira Banu in the lead roles. He directed Ittefaq (1969), a mystery thriller film based on a Gujarati play, depicting the events of a single night, with Rajesh Khanna and Nanda in the lead roles. Shot in a month and on a low budget, the film was deemed unusual by critics. It was one of the first Hindi films which did not have any songs or an interval. It was eventually declared a semi-hit at the box-office and won Chopra his second Filmfare Award for Best Director. Formation of Yash Raj Films In 1970, Chopra founded the independent Yash Raj Films, terminating his creative collaboration with his brother. His first independently-produced film, Daag: A Poem of Love (1973), a melodrama about polygamy, starring Rajesh Khanna, Sharmila Tagore and Raakhee was a major critical and commercial success and Chopra won his third Filmfare Award for Best Director for the film. He directed a number of classic cult films starring Amitabh Bachchan and scripted by Salim–Javed, notably Deewaar and Trishul, which were major commercial successes and remain popular even today. These films set the trend for the late-'70s and '80s, establishing Bachchan as the "angry young man". Chopra won his fourth Filmfare Award for Best Director for Deewaar. Chopra produced, directed and scripted 2 more films starring Bachchan. Unlike his earlier action-oriented films, these 2 were musical romantic dramas: Kabhi Kabhie (1976), co-starring Raakhee, Shashi Kapoor, Waheeda Rehman, Rishi Kapoor and Neetu Singh, followed by Silsila (1981), co-starring Jaya Bachchan, Rekha and Sanjeev Kumar. Chopra suggested Javed Akhtar to become a lyricist, starting from this film. The '80s marked a professional setback in Chopra's career, as several films he directed and produced in that period failed to leave a mark at the Indian box-office. His film Mashaal (1984) was his first collaboration with the legendary actor, Dilip Kumar. The action-oriented film, which was based on the well-known Marathi play titled Ashroonchi Zhali Phule, received critical acclaim, but fared only average at the box-office. A year later, he made Faasle, a romantic drama starring Sunil Dutt, Rekha, Rohan Kapoor and Farah, which proved to be a critical and commercial disaster. He and critics consider it his worst film. Vijay (1988) was also a box-office failure. The film received mixed reviews from critics and was dubbed a remake of Trishul. Chopra's lean phase ended in 1989 with the highly-successful