Astrid brings Walter a magazine in 'Do Shapeshifters Dream of Electric Sheep?' with the word "TWINS" on the cover, foreshadowing the plot twist in 'Amber 31422'.
The Franklin St. Station subway sign in 'Amber 31422' shows the numbers 6-9-5-5, foreshadowing the radio station frequency investigated in '6955 kHz'.
CASE REPORT SUMMARY:Fringe agents were called to the Franklin Station quarantine area of Brooklyn for a breach alert. It had been sealed for four years, but agents arrived to find disrupted amber that contained a new person, convicted thief Mark Wilner, and broken amber that had contained bank robber Joshua Rose. According to Colonel Broyles, four years prior, Rose had created a device that allowed him to access sealed vaults without tripping alarms. The device also caused molecular degradation, so amber quarantines had to be enacted at each robbery site. Rose was finally caught in an amber protocol at Franklin Station.