Pyar Ka Mausam is a 1969 movie under Nasir Hussain films banner. Hussain wrote, produced, and directed the film. It starred Shashi Kapoor ,and the Nasir Husain fixture- Asha Parekh. It also had Bharat Bhushan , Nirupa Roy , Madan Puri and another Nasir Husain fixture Rajendranath.
Two more Husain fixtures wrote the memorable songs: lyricist Majrooh Sultanpuri and music composer R.D. Burman, who also has an acting role in the film. The film became a Silver Jubilee Hit.
The story was on Nasir Husains favorite theme, a family whose members get separated at the start of the movie and after much action are reunited at the end of the movie. The theme song [Tum bin jaoon kahan] is played several times in the film: Mohammed Rafis version is picturized on the hero Shashi Kapoor three times, while Kishore Kumars version is picturized on Bharat Bhushan twice. The song is a key part of the movie like the key songs in later movies of Nasir Hussain [ Yaadon Ki Baraat and Hum Kisi Se Kum Nahin ].
The key song helps in uniting long lost family/lovers in all three films.
It is one of two films in which Music Director Rahul Dev Burman plays a role in the film apart from giving the music for the film.