The highest-grossing Indian film of 1962.
Loosely based upon Sir Arthur Conan Doyle's novel "The Hound of the Baskervilles" and Hemendra Kumar Roy's novel "Nishithini Bivishika."
Biren Nag repeated the same lead pair of Biswajeet and Waheeda Rehman in his next thriller, "Kohra."
Biren Nag's directorial debut.
Uttam Kumar declined the film as Waheeda Rahman's character had more scope than he did.