Mulder and Scully investigate a US Navy vessel trapped in the Norwegian Sea, where the crew have become subject to rapid aging.
- As Long as It Sounds Foreign: The idiom that lends the name to the episode doesn't exist in Scandinavian languages. It is also unlikely that a Norwegian would have Trondheim as a first name (it is the name of a large city), but he was actually born in Pensacola.
- Bermuda Triangle: The obvious inspiration of the episode despite the Norwegian setting.
- But Not Too Foreign: Trondheim lives in Norway but he was born in Florida.
- Foreign Language Title: The title is Danish/Norwegian for "dead calm". It is, however, a literal translation of a phrase that doesn't exist in either language, as noted in As Long as It Sounds Foreign.
- Ghost Ship: Mulder and Scully get trapped in Norway on a boat. They age rapidly.
- Gratuitous Foreign Language: Norwegian.
- Karmic Death: Trondheim locks himself in the hold and hoards all the drinkable water, so obviously the outer hull of the ship rusts away and he drowns in the hold.
- Norse Mythology: Scully references the Fenris Wolf and Ragnarok.
- Rapid Aging: Although it's actually more like rapid cellular damage caused by contaminated water.
- Setting Update: A fairly typical Bermuda Triangle set off the Norwegian coast, of all places. Probably because at the time, the show crew didn't feel they could convincingly fake the Caribbean in Canada. The actual Bermuda Triangle was later brought to the front in... well, Triangle.
- Television Geography: The mystery triangle lined by Mulder actually covers one of the most transited sea lanes in Norway and its next to one of its largest cities, in contrast to the remote, rural-feel of the episode.
- That Came Out Wrong: Mulder to Scully, as he's seasick on the ship.Mulder: You're lucky you inherited your father's legs.
Mulder: His sea legs.