C.I.D. - Season 1 Episode 83

With the news of a high-profile criminal trying to cross state borders, CID officers pose as railway officers to try and catch him. But in the process of catching him, they encounter a child at the railway station, who has run away from home in search of his father. His father, who worked in Mumbai, has recently stopped sending him letters, a tradition he kept up for ages. The search begins for the boy's missing father.