Hook may be heading down a dangerous path in the next episode of 'Once Upon a Time.' Hook (Colin O'Donoghue) will be struck with a big decision in the next episode of ABC's Once Upon a Time.

Regina and Robin Hood may be on 'solid ground' but is there a bumpy road ahead? What's ahead for Regina (Lana Parrilla) and Robin Hood's (Sean Maguire) complicated relationship on ABC's Once Upon a Time? How Does Hades Differ From Past 'Once Upon a Time' Villains? As Regina and Robin proceed through the Underworld, their relationship will stay strong despite some complications coming up along the way.

Lana Parrilla discusses why Hades is the most powerful villain on the series yet. Hades (Greg Germann) does not want Regina (Lana Parrilla) in the Underworld on ABC's Once Upon a Time.

Regina will step up as the hero the Underworld deserves in the second half of the season. Regina (Lana Parrilla) will play a key role in helping lost souls in the Underworld in upcoming episodes of ABC's Once Upon a Time.