27 Sept. Yash Chopra would have turned 94, and Mahendra Kapoor left us 18 years ago. In Kaala Patthar, Amitabh and Rakhee walk silently through a rainy night under one umbrella, and a Punjabi song from a distant dhaba says everything they won't: इश्क़ और मुश्क़ कदे न छुप दे...