This is a simple timeline, and does not represent a complete historical list of government and private entities involved in investigation of anomalous phenomena.

The technology for television existed prior to World War II, but it was in the late 1940s that television sets became household items and talented entertainers could pave the way for the new medium.

The show runs back and forth, jumping between different timelines (1940s, 1740s) as more characters are introduced who can time travel, including Claire's daughter Brianna and her husband Roger.