鋼鉄都市
"The Caves of Steel" garnered good reviews: "The Daily Telegraph" said the play "proved again that science fiction can be exciting, carry a message and be intellectually stimulating" while "The Listener", citing the play as the best of the "Story Parade" series, described it as "a fascinating mixture of science fiction and whodunit which worked remarkably well". The play was repeated on BBC1 on 28 August 1964. As was common practice at the time, the master tapes of "The Caves of Steel" were wiped some time after broadcast and the play remains missing to this day. A few short extracts survive: the opening titles and the murder of Sarton; Elijah and Daneel meeting Dr. Gerrigel (Naomi Chance) and Elijah and Daneel confronting the Medievalist Clousarr (John Boyd-Brent).