When Scotty tells Kelly that Professor Becker was the Ethics and Morals teacher at Temple University, this is a reference to Bill Cosby's real-life alma mater in Philadelphia.
The ditty sung by Kelly, Scotty, and Fraulein while in the car is "The Schnitzelbank Song", a German-language children's song. It has also been used in various movies such as Wedding Present (1936) and Stalag 17 (1957).
In the scene where Scotty balances the food tray on his head, Kelly is reading the Nancy comic strip aloud from the newspaper. Nancy was created by Ernie Bushmiller (1905-1982) in 1933 for the comic strip Fritzi Ritzi, and the precocious eight-year-old received her own comic strip in 1938. At it's peak, Nancy appeared in more than 880 newspapers. The daily strip still continues, under the direction of different artists and writers.
While working out in the gym, Scotty is wearing a sweatshirt from Temple University-- the real-life alma mater of Bill Cosby.
Robert Culp--who wrote this episode--based his script on the controversial 1948 British film, No Orchids for Miss Blandish.
In the episode's closing credits, Cicely Tyson's surname is misspelled Tysson.
The twin brothers played by Osvaldo Ruggreri were named Romolo and Remo, after the mythical twins of ancient Rome, Romulus and Remus. By legend, they were suckled by a wolf and were the founders of Rome.
When the dog gets up to growl at Kelly, the "grass" bunches up beneath it on two occasions, revealing that it's studio artificial turf.
When Alexander Scott is captured by Zulu King Cetshyayo on board his vessel, Cetshyayo states "we Zulus created the burnt Earth policy in the 1820s". This is inaccurate as "burnt or scorched Earth" policies can be traced from antiquity through the Middle Ages centuries before the 1820s.
Shenko is staying in one of the penthouse suites at the hotel. However, when Scott checks in, there are only three penthouse key boxes and they all three have keys. The clerk then grabs all three keys and tells Scott to pick which one he wants. There's no box for the penthouse that Shenko is already occupying.
When Gurney gives Kelly his briefing, he says that Shenko is staying at the Savoy Hotel. However, when Scott checks in later to the hotel where Shenko is staying, the clerk welcomes him to the Nutani Hotel.
The Russian lead agent calls the hotel room and Igor picks up the phone and answers. Upon hearing his voice, the leader calls Igor "Koski," the other bodyguard.
Merritt not only misidentifies Shelley as Keats, but he misquotes Keats' Stanzas. He says, "Writh'd not of passing joy," but the correct line is "Writh'd not of passed joy."
Trivia:When Scotty and Kelly are getting Mr. Wade off alone, you see a couple of shots where their jackets may show their true alliances--their jackets are red (Scotty), white (Wade), and blue (Kelly).
During the final fight, the stunt man filling in for Robert Culp has noticeably broader features, and a hairstyle with more of a widow's peak than Culp's typical combover.
In the opening shaving scene, the shaving cream on Kelly's face, particularly on the right side, alternates from shot to shot. It varies from fully covering his face, to partially covering his face, to being gone, to back again.
In the tracking shot after Kelly gets to blow the ferry's horn, near the bottom of the screen, there is a little boy who is clearly making faces at the camera!
Kelly actually names where they are staying in Hong Kong as The Peninsula Hotel.
The stuntman filling in for Bill Cosby during the sparring scenes is much more muscular and has a different hair
When Mano beats Scott, the seam of his right sleeve is ripped at the shoulder. However, when he leaves the room, the rip has disappeared.