This episode served as a "backdoor pilot" for the 2012 TV series The Finder (2012) which starred two of the guest stars in this episode, Geoff Stults and Michael Clarke Duncan.
In the original Richard Greener novels, Walter is a Vietnam veteran in his mid-50s who lived on the US Virgin Island of St. John and got his start finding people by trying to locate an AWOL soldier before the MPs did, and Ike was a man.
The murder victim in this episode is named after one of the assistants to the executive producers of the show, Samuel Nozik.
The plot of the episode (a XVII century navigational chart, a sunken treasure ship, a Jesuit conspiracy, latitude and longitude codes and an unscrupulous treasure hunter) is loosely based on the novel "La Carta Esferica", by Spanish author Arturo Perez-Reverte.
Ike gets upset with Walter when he suggests that she is a lesbian. In real life, the actress playing Ike, Saffron Burrows, is bisexual and married to a woman.