Primetime special | ABC | 9/27/2015 airdate. It was the first Sunday of a new television season. ABC looked to launch Season 5 of Once Upon a Time, along with two all-new series, and the network turned to Hodder to produce a special to kickoff this very important night. Hodder tapped into the passionate ONCE fan community as the foundation of the special, gathering fans’ insightful questions and unique perspectives on the series. The result? A nostalgic trip back through the first four seasons, following a course charted by the passionate “Oncers." The cast, along with creators Edward Kitsis and Adam Horowitz, answered fan questions, relived favorite moments chosen by the ONCE faithful, and provided a sneak peek into the rise of the Dark Swan. Plus, some very special super-fans even got their self-shot videos included in the special!