'Underground' executive producer John Legend set to make an appearance on the critically acclaimed series next season...
According to reports John Legend will guest star as self-emancipated American turned abolitionist Frederick Douglas on the next season of 'Underground.'
'Underground' stars Jurnee Smollett-Bell, Aldis Hodge and Alano Miler as escaped slaves making their way to freedom.
'Underground' airs on WGN America.
