This was the first episode broadcast under the title "Amos Burke - Secret Agent".
The use of a Douglas DC-9 in the opening sequence is interesting as it must have been an early build. The episode aired on September 15, 1965. The DC-9 first flight was February 25, 1965 and it did not receive the FAA type certificate until November 23, 1965. The aircraft was not in service when this episode was filmed.
The main sets of the castle (itself the Playboy Mansion prior to Hefner's purchase of it) are a redress of a set used at least twice in the previous season, while the entry is a redress of Burke's home.
Closing credits: The events, characters and firms depicted in this photoplay are fictitious. Any similarity to actual persons, living or dead, or to actual firms, is purely coincidental.