I recently saw the DVD version of this movie. It has a commentary by Randhir Kapoor where he talks a bit about the making of the movie, how they designed the special car. overall a fantastic movie and each character plays his role to perfection. One of the best Bollywood slapstick comedies. The key characters are Randhir Kapoor trying to find a bride, Poonam Dhillon who plays the daughter of a retired army general (Sanjeev Kumar) and Rajendranath who plays a total buffoon to perfection. Sanjeev Kumar also plays a double role that of a conman. For those who have not watched it go out there and watch and is much better than the current movies (most of which are copied from Hollywood movies).
Review of Biwi-O-Biwi
