Watch Once Upon a Time Online: Season 5 Episode 15

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How did Hook fare in his quest to end Hades' reign of terror in the Underworld?

On Once Upon a Time Season 5 Episode 15, Hook joined forces with Liam and they went after a book that could prove the key to taking down Hades.

Elsewhere during the hour, Henry was reluctant to not have a back up plan, so he devised a plan of his own that put him in a lot of danger. What happened?

In flashback, we got some much needed insight into the Jones brothers. 

Use the video above to watch Once Upon A Time online to get up to speed.

Paul Dailly is the Associate Editor for TV Fanatic. Follow him on Twitter.

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