The Hawaiian Islands are one of the most geographically isolated places on earth, over 2,400 miles and nearly 4,000 km to the closest landmass, which is California, USA. Born of a volcanic hotspot rising from the sea floor of the Pacific Ocean, the Hawaiian archipelago formed nearly 75 million years ago, with the eldest islands of the chain long since eroded and submerged beneath the sea’s surface to the northwest and the youngest of the islands still forming beneath the sea’s surface to the south east.

Mac investigates a mass arrival of Travelers, while also trying to repair his marriage with Kat. Philip is given assistance with his addiction from fellow Traveler 4514, Jenny. Marcy treats David for PTSD, but is dealing with feelings of detachment and disassociation herself. Carly and Jeff try and clean up their act for Child Protective Services and regain custody of their son. Trevor and Grace bond in the hospital while recovering from their injuries.
During an update for historians, one of them dies from cerebral overload and is taken over by another traveler. The faction then breaks in and kidnaps the historians. A Blackbox is a device used to extract information from an unconscious or dying person and the team uses one to access a critically injured Hall to ascertain the location of historians. Jeff reaches out to his police sergeant to get his job back and is told to get help from a social worker first. Philip is questioned by the faction. Philip is given time with Kyle as a gesture of good will, who states that he sympathizes with the faction's goal, especially since he just saw another historian die during the update. Faction saves a TELL that Kyle provided to gain his support. Jeff reaches out to David to sign his therapy form for him to get his job back. David agrees to help as a social worker with Jeff's addiction, which the traveler doesn't actually have. Hall is able to relay information from when he was tracking his team's historian showing he ran into a faction team and was shot climbing a fence. He reveals that it was Kyle and Luca from his own team that shot him. Hall is able to show the team the location of the historians and the team is dispatched. While with David, Jeff receives a message to meet up at the location for tactical support. Philip is able to escape before being cornered by Kyle and Luca. Maclaren's team shows up just in time to save Philip and kills Luca and Kyle. The team saves all the historians while taking out many of the faction. Hall is told he saved them all and is able to pass away in peace knowing that. Jeff and Carly reconnect. Philip is seen throwing out his yellow pills that historians have to take.
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