Charlie is married to Mona Foster, an insect specialist, by season 4. He has a scar under his left eye and takes a regular injection to treat an arachnid infestation inside of his bloodstream.
He and the Fringe Division team respond to an event at the Manhattan theater where Olivia, Walter Bishop and others crossed over. Later, after Olivia impersonates Fauxlivia, he goes with her to see Peter Bishop and Olivia knocks him out. ("Over There: Part 2")
He was in charge of tracking down Olivia Dunham after she escaped from the Department of Defense facility on Liberty Island. He caught up to her at Marilyn Dunham's house and brought her back to Fringe Division. ("Olivia")
|Alternate Universe Characters|