Fringe : Season 3 : Episode 6 : “6995 kHz”
While investigating a series of amnesia cases, the Fringe team – with a little prodding from Olivia-2 – end up cracking an ancient code and digging up some pre-human machinery. This is a major expansion of the show’s scope, and may lead to some improbable First People science.
The number stations (which are a real phenomenon) aren’t necessarily linked to some mythical First People, they’re linked to the book that Peter recovers. Think, Walter.
A tenuous link to Breaking Bad! Astrid’s choice of music was a fugue (though that wasn’t the piece that actually played) and a fugue state is a type of amnesia, which was what Walt claimed to have suffered after Tuco dragged him out to the desert.