As the fishermen's boat tips over in panel 6 of page 1 of the story, notice that two blobby humanoid figures underwater are seen tipping it in the bottom right corner of the panel.

The beginning of the story tells the reader only that the current area of alien activity is in northern England. The circled area on Straker's wall map on page 1 of the story, where the burned-out alien spacecraft have been found, looks to be the northern England coastal town of South Shields. This would make the watercourse around which the alien activity takes place the River Tyne.

On pages 3-4 of the story, SHADO agent Maine is dragged under the water by aliens, who carry him to their underwater cave and seal him up in a pod for later transport to their homeworld. But how was Maine able to survive unconscious under the water while the aliens carried him to the cave?!

This story depicts the SHADO Mobiles travelling amphibiously over water, where they can make up to 30 knots. This same ability was seen in "The River of Death". This capacity was mentioned in the "SHADO Defence: SHADO Mobiles" article in the 1970 UFO ANNUAL published by Polystyle Publications (the same publisher as Countdown/TV Action).