LT Danny Green is shown in his Service Dress White uniform with an unshaven face. Even with relaxed grooming standards, once he puts the uniform back on he would be required to shave.
Hong Kong's Kai Tak Airport is shown as a functional airport, when in reality it was closed in 1998 in favour of the new Chek Lap Kok Airport. The terminals have been demolished since, and at present no section of its runway long enough for a C-130 to land (and, more importantly, take off again) remains.
In the opening credits starting Season 3, the blue serum drop falls onto St. Louis. The map shown is highlighting the St. Louis metroplex, which extends through East St. Louis and beyond into Illinois, not the state of Missouri. Rockford, Des Moines, Kansas City, and Springfield are all shown correctly placed in relation. The blue covers the river markings on the map, if you look closely you can see part of the Mississippi extending into the "L" in St. Louis.
When Scott is escorted out of Kai Tak Airport, the background is a horizontally flipped view of Hong Kong Island. This view would also not be as visible from Kai Tak's former entrance, mostly being obscured by Kowloon's high rise.