Despite the crew uniforms and presentation model carrying the name "HL Friendship" Joe calls it "SS Friendship".
All three launch control operators were said to have been injured in the crash, but only two were shown using the escape capsule.
Due to typing errors in the script, Sam and Mac both refer to the OGT as "OGC".
The pilot of the plane tells Sam to eject the canister on the red light. Perfectly simple, but Sam only has a green and yellow light, and ejects the canister on the yellow light.
The Eastern Alliance troops have the same insignia on their hats as the World Army officers from "Colonel McClaine".
Joe sees Shane as a cowboy and sign for Joesville on the TV before he falls asleep.
As Mac and Joe escape in the Jet Air Car, the ground underneath them starts exploding for no reason. The script mentions that this was the army firing their weaponry at the vehicle, but there was nothing to indicate this was the case in the episode.
Mac and Joe say they'll move in on the castle as soon as it gets dark, but when they synchronize their watches, it's already 1:31am, well after dark.
The self-destruct panel in the OTC space station is the same panel used in the Captain Scarlet episode "Renegade Rocket". 'ZERO' was the rocket's self-destruct codeword.
Despite the letters "OTC" being clearly written on the outside of the space station, all the characters refer to the place as "OCT".
Both 'metallurgist' and 'optician' are misspelled on the list as 'metalurgist' and 'opticion'.
The brain pattern list gives Bil Frazer's number as Q8, but in "BIg Fish" it was Q14.
Mason's tombstone shows he died in 1996, which is said to be 17 years ago. This places the episode in 2013 when it should be 1998 according to the writer's guide.
In some shots the markings on U85 were reversed.
The jammed missile tube was on U85's starboard side when it sunk, but was on the port side when Joe arrived.
World Airways Passenger Jet AV21 changes markings to CV9 while in the air, but is then back to AV21 when it lands.
As the co-pilot reaches for his radio just before he is shot, the jacket sleeve in the close ups of a real hand doesn't match the what the puppet was wearing. The puppet had a light blue shirt and dark blue jacket, but the real hand had a dark blue sleeve and brown jacket.
When the co-pilot is shot by Kramer, the pilot refers to him as Bill. However later it is the pilot's name that is Bill, while the co-pilot was called Frank.
The end credits list Tony Barwick as the author of this episode, but it was actually written by Shane Rimmer.
The aircraft noises are recycled from Thunderbird 2 of the original Thunderbirds series.