John Edgar Hoover (played by Eric Ladin) is the newly-appointed head of the Bureau of Investigation in America. He is a recurring character in Season 4 and rival to Agent James Tolliver.

Season four appearances
"New York Sour" "Resignation" "

'Acres of Diamonds'"

"All In"
"Erlkonig" "The North Star" "William Wilson" "The Old Ship of Zion"

'Marriage and Hunting'"

"White Horse Pike" "Havre De Grace" "Farewell Daddy Blues"
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