Simple Kapadia

Mr. Choudhary does not approve of his son, Arun, indulging in singing songs and music. He wants him to be a businessman like himself. Out of fear of his father finding out about his continued indulgence, Arun changes his name to Sanjay Kumar. He soon becomes a popular singer, and is even hired by the local radio station to sing songs. (imdb)

A young man fights spies to defend his country. (imdb)

Industrialist SK Nanda had thrown his son Ramesh out of the house as he wanted to marry a poor girl. 10 years later, his son Ravi returns from abroad and convinces him to get Ramesh back. Ravi travels to Darjeeling to get back Ramesh and his family. On the way to Darjeeling, Ravi falls in love with Kanchan. Ravi is unaware that Kanchan is the sister of Ramesh's wife nor Kanchan is aware about Ravi. Kanchan is on the run with her nephew Paapu as the goons are behind them and want to tak... (imdb)

Airforce pilot Bhagat's wife Raksha and his father are killed in a bank robbery where his father works on the day he was celebrating his wedding anniversary and son's birthday. Bhagat notices that one of the robbers had a torn shoe and finds a locket similar to what his wife had. His investigation takes him to hilly regions where he introduces himself as Jim Darcy.