Dhanna

Raja (Dev Anand) has been abandoned by his biological mother at a very young age, and grows up with Master (Jeevan), a criminal don and card-sharp, who would like Raja to continue working with him on a commission basis. Raja learns all that could be learned about playing cards, quits work with Master, and starts work on his own. He succeeds considerably, and soon gets rich and wealthy. He falls in love with beautiful Chandra Gangaram (Zaheeda), and would like to marry her. But her father would like her to marry U.K. settled Ram Mehta(Sudhir), before Raja could do or say anything against this alliance, he is charged with the cold-blooded murder of Master. The climax in Raja's life is in the Court Room where he will find out about his past, and about his parents - while he awaits the outcome of the trial. From http://en.wikipedia.org/wiki/Gambler_(film)

Widowed by the sudden passing of his wife, Superintendent of Police, Choudhry, brings up his son, Rajesh, on his own, teaches him all known good values, and when he grows up sends him to College in Bombay, and remits money to him regularly. Choudhry would like to transfer to Bombay Police, so that he can be close to his son, and then one day out of the blue, his transfer is approved, and a delighted Choudhry writes to his son to pick him from the railway station. Upon arrival in Bombay, he does not find his son at the Railway Station, but when browsing through a newspaper he sees his son's photograph - wanted for the murder of a card-sharp. Shocked and dismayed, Choudhry attempts to piece his life together and attempts to find Rajesh before the City Police do - for he may well face the death sentence. Choudhry does find him, but only after Rajesh is accused of killing a woman named Kishori, and this time Choudhry is quite sure that there is no hope for Rajesh.

The film tells the story of four children who are separated at a fair and unknowingly reunite years later when Geeta (Sadhana) meets Nita (also Sadhana) in prison. Nita has been wrongly accused of murder. Geeta is then caught up in a scheme to find the true killer which leads her to her brother Johnny's (Sunil Dutt) gang.