Writers Richard Conway and Stephen J. Mattick named Magnus's colleague, Dr Turner, after the episode's director, Ken Turner.
In the script, it was suggested that Wexham Park Hospital could be used as a location to shoot footage showing the development of Tiempo's radiographs. In the end, however, the episode was filmed entirely at Century 21's studios on the Slough Trading Estate.
One of the medical students that appear in the opening scene was played by a puppet that was originally sculpted as the prototype of Captain Scarlet.