The story centers on an FBI agent, who is forced to work with a dysfunctional scientist and his son in order to explain the formation of a series of strange occurrences.
In the second season of the series, Olivia is involved in a car accident. The department continues to investigate after an explosion that killed a police officer. Olivia experiences visions from the other world, and the team continues to investigate strange incidents.
Following a remarkable turn of events in the third season, Olivia, who is imprisoned, struggles to find her way home. Events pick up speed as Peter and Walter attempt to move on with their lives.
There are numerous developments in the fourth season, including the continuation of the truce between the two worlds following Peter Bishop's disappearance, Lincoln Lee joining the team to investigate shapeshifters and find a hidden killer, and Peter and the team taking extraordinary precautions to...Read more safeguard the world.
The Observers start transforming Earth in Season 5, which takes place in 2036. Walter intends to defeat them, but he may run into trouble if the Watchers capture him. In the meantime, Harvard University turns into a covert Observers center, and Peter looks for Olivia to bring his family back...Read more together.