Ahead of the epic finale to the six-year-long Tales of Arcadia franchise, Colin O'Donoghue reflects on Douxie and the magic of Guillermo del Toro.

Former Once Upon a Time ster Colin O’Donoghue will portray Lt. Gordon Cooper opposite Patrick J. Adams and Jake McDorman, taking over for Joe Dempsie, who had to exit the series because of visa issues.