Kedarnath Saigal

An engineer's dream of making the perfect train for Indian Railways is given hope when the company commissions his prototype. After years dedicating himself to his dream, his family has suffered, but now he hopes to make it all up to them with the train's triumphant inaugural journey. However, an embittered fellow employee has other ideas.

Professor, an Indian scientist, develops a nuclear project to bring world peace. When Wong and Wasco want to get their hands on the project, it is up to CID Agent Raju to save the day.

Peter (O. P. Ralhan) and Kitty (Helen) love each other, but due to Peter's poverty, they are unable to marry each other. One day, during a secret rendezvous, Peter accidentally overhear a conversation between one Mahesh Jetley and his paramour, where Mahesh tells her that he is soon going to bump off his wife on a certain date. Peter and Kitty decide to foil this man's plans. However, there are 2 problems: 1 - They have not seen Mahesh or his paramour's face. 2 - Even if they had, no one would believe their story. Hence, the lovers decide to do a little investigation on their own. They find three Mahesh Jetleys. On some snooping, they find that each man is married and each of them has a miserable married life. To find their suspect, they devise a plan whereby they will stage an attack on each man's wife. Whoever the culprit is, will freak out and his identity will be revealed.

The city is rocked by a serial killer who only kills young women at night, so women don't want to step outside the house when it turns dark.

Ravi, son of industrialist SK Nanda, returns to find Ramesh and his family, falling in love with Ramesh's sister Kanchan, who discovers Ravi is Ramesh's younger brother and promises not to visit Nanda house.

An estate manager discovers his employer dead and a mysterious woman unconscious after a car accident, and must collaborate with a police inspector to solve the mystery.

A respected officer keeps a gangster's money box, leading to his arrest, dismissal, and jail time, and then joining the same gangsters.

Plainclothes Police Inspector Amar has been assigned the task of apprehending an elusive criminal don who goes under the name of Hardayal. During his investigation, he meets with fellow Inspector Chhaya, and both fall in love. During this investigation, Chhaya finds out that Amar has been two-timing her, and there is confrontation between the two. Amar also goes beyond the call of duty, and is subsequently suspended. Stripped of his powers, Amar is caught by Hardayal and imprisoned, leaving Chhaya alone to figure out the whereabouts of this criminal.