The television cameras in the pre-credits sequence covering Jay and Maggie's gig bear the genuine logo of ITV broadcaster ATV, with whom ITC were affiliated. Later, Inspector Morrell is seen leaving ATV House at 17 Great Cumberland Place, London W1.
Hamlyn Gynt hails from Duluth, Minnesota. His education took in Northwestern University and the Columbia University College of Physicians and Surgeons in Manhattan, New York. He arrived in England six years previously, switching his professional interests from pathology to archeology and criminology.
Adam tells Inspector Morrell he spent eight years at his desk.
The Strangers' track "The World of Love" was the B-side to their 1970 single "I've Got You" on the Harvard label (HARV 001).
As Adam is fully aware, James Knox Polk was the 11th president of the United States, serving between 1845 and 1849.