12 Monkeys - Season 4, Episode 1: Soundtracks

2043 - Cole and Cassie wander the streets of New York; the Splinter team works to get the time machine working again.

Voiceover about the legend of the Serpent and Demon; 1491 - England - Knights ride through a forest until they reach a gathering of Primaries and demand to know the location of the weapon.

Jones manually closes the core to enact Project Splinter, then joins an injured Whitley in the hallway; Cassie rushes to find Deacon as Jones talks Hannah through initiating Project Charon.

Cassie and Cole head out into the city then with the rest of the group begin to fix the time machine; Gillies tells Cole that the need a core and to get a core they need a time machine.

July 2018 - Prague, Czech Republic - As he does his rounds, a museum security guard activates an audio recording in The Ouroboros section.