"This original Sherlock Holmes case (from a story by Anthony Hinds under his John Elder alias) also marks Peter Cushing's last starring role – he had first played the fastidious Baker Street detective in Hammer's 1959 version of THE HOUND OF THE BASKERVILLES, reprised in two TV series in 1964 and 1968 (during the course of which he eventually relinquished the part to Douglas Wilmer)"
