'Once Upon a Time' Casts Another Treasure-Loving Pirate From Hook's Past: Captain Silver! 

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spellbinding drama returns, Storybrooke fans will be introduced to a new ship-loving pirate with a stormy past. Actor Costas Mandylor has been cast to play Captain Silver, ETonline can exclusively reveal.

As of now, details surrounding this mysterious newcomer are being kept locked away in the depths of the sea, but we can share that Captain Silver definitely has some rough-watered history with Killian Jones, aka Captain Hook.

Mandylor will make his swashbuckling debut in an upcoming episode this spring in

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Although this speculation has yet to be confirmed, we have a magical hunch that Mandylor's Captain Silver

be Captain Long John Silver -- the cunning and villainous pirate from the 1883 novel,

It would definitely make sense if ABC's fairy tale-focused drama were to incorporate

into its fantasy repertoire. Disney already adapted the beloved Robert Louis Stevenson novel into an live-action movie in 1950, and subsequently released the 2002 animated feature,

WATCH: Hook and Emma Can't Stop Kissing in This Sneak Peek Clip!

creators have deviated from the Disney path many times in the past with their signature twists on other classics from the Victorian Era like

, so perhaps this Captain Silver will fit in nicely with a certain pirate family. (You know which one we're talking about!)

returns with its 100th episode on Sunday, March 6 at 8 p.m. ET/PT on ABC.

Calling all Storybrooke fans! ET will be with the stars of

this Saturday at the special red carpet celebrations for the 100th episode. Be sure to send your questions for the cast to @LeanneAguilera on Twitter!

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