In this episode Cesar Romero's character, Diego Santana, is celebrating his 60th birthday. In real life Cesar Romero was 78 when this episode was filmed.
Several guest stars were in various John Wayne movies. Capucine and Stewart Granger were in North to Alaska (1960), Judy Geeson was in Brannigan (1975) and Cesar Romero was in Donovan's Reef (1963).
Capucine (Belle Chaney) and Stewart Granger (Sir John Landry) previously starred together in North to Alaska (1960).
The helicopter seen (Spain registration number EC-JAX) is an Enstrom model 280 "Shark". Though less common these are preferred by some flight instructors over the Robinson R22 as trainers.
The Enstrom F-28 and 280 are a family of small, light piston engine powered helicopters produced by the Enstrom Helicopter Corporation.