Harvey Dent only popped up in three of Gotham's twenty-two episode run, but that's going to change with Season 2. Nicholas D'Agosto who portrays Dent on the show confirmed he's been made a season regular, meaning Gotham's White Knight's could be a key part of the forthcoming narrative. https://twitter.com/nicholasdagosto/status/603671025826402304 Whether that'll amount to a transformation into the villainous Two-Face is another matter entirely. In the comics that tragic metamorphosis doesn't happen until Bruce Wayne is all grown-up, but as Gotham fans know, the show's creative team are pretty liberal when it comes to rearranging established lore. D'Agosto's performance has generally been charming and affable, but there have been moments, little anxious indicators, that Dent has a dark side waiting to be exposed. Whether it's for good or bad, you'll be seeing more of Dent in the months ahead.