Timeless - Season 1 Episode 15 -

Lucy, Wyatt, and Rufus decide to take matters into their own hands, but are caught off guard when Flynn lands in 1931 Chicago to call in a favor from notorious gangster Al Capone. Hot on Flynn's trail, our heroes try to enlist the help of famed lawman, Elliot Ness, in pursuit of Al Capone after Flynn aids him in avoiding justice. A clue leads the team to a crucial revelation about Rittenhouse.