He is known for portraying Jed Harper in `` Bedlam '' , Walter William Clark , Jr. in the crime drama `` Golden Boy '' and Tobias `` Four '' Eaton in the film adaptations of Veronica Roth 's dystopian sci-fi novels , `` The Divergent Series '' .
He is known for portraying Jed Harper in `` Bedlam '' , Walter William Clark , Jr. in the crime drama `` Golden Boy '' and as `` Four '' , a military instructor , in the film adaptation of Veronica Roth 's dystopian sci-fi novel , `` Divergent '' .