Kaala Patthar is not remembered for its portrayal of workers’ woes. More than 45 years after its release, it’s the rivalry between the stars—Amitabh Bachchan and Shatrughan Sinha—that ...

Mangal (Shatrughan Sinha) is an escaped convict who finds shelter at the coal mine. KAALA PATTHAR is inspired by a true mining tragedy in Bihar.