Larry Wilcox's apparent proficiency with an M-16 is not a result of good acting, he is a decorated Marine Corps veteran that served in Viet Nam. He was honorably discharged with the rank of Staff Sergeant.
The site where Vera wrecks is that of Aloha Stadium, which was under construction at the time.
At lunch, Professor Metzger and Danny are talking about the People's Attack Group, Professor Metzger uses the expression "nom de guerre" which is French for "war name".
This episode (and season) mark the second time that the opening theme song was re-recorded to sound noticeably different. (The first time was at the beginning of Season 5).
The show ends on a sentimental note as Danno emerges to see McGarrett, and they leave together. It is similar to the end of season one's show "...And They Painted Daisies On His Coffin," another rare instance of male bonding between the two.