John Larch (Joseph Trinian) and Vivi Janiss (Emma Trinian) played husband and wife in this episode. They were actually married at the time.
Steve McGarrett was a naval intelligence officer before joining 5-0, and served in Japan during the Korean War.
The uniform that Joseph Trinian wears when he goes to kill the attorney general is dress khaki. This uniform was popular during and after World War II and Korea. It was phased out in the 1970's.
It is mentioned that the Kamehameha celebrations are beginning. King Kamehameha Day Is celebrated on June 11th each year.
When Trinian is going to kill the attorney general, he is wearing a "dress khaki" uniform.