Chen reveals there is a being known as the Traveler from hundreds of years in the future, and Chen's consciousness from different timelines was fused. This plot aligns with Travelers (2016) where a "Director" hundreds of years in the future sends the consciousness of people from that time into the bodies of 21st century people, who are called Travelers with a unique number. Several recurring actors from this series appeared in that one, such as Ian Tracey, Jennifer Spence, and Stephen Lobo.
Michael Eklund (Robert Zorin) & Ian Tracey (Jason) also worked together on Bates Motel (2013) as Zane Morgan & Remo Wallace respectively.
They keep with time as this series 4 has got Hour in each title.