Once Upon A Time Season 5 Episode 18: Ruby Slippers Sneak Peeks

ABC has released a couple clips from tonight's "Ruby Slippers" episode of Once Upon a Time.

In the first clip, Hades (Greg Germann) warns Zelena (Rebecca Mader) that Ruby is in town. And in the second clip, Mulan (Jamie Chung) and Ruby (Meghan Ory) come across Toto and Dorothy (Teri Reeves).

Check out the sneak peeks in the videos below.

In flashbacks, Ruby and Mulan find themselves in Oz, where they meet Dorothy. After the three witness Zelena's return to Oz, they look for a way to defeat her once and for all. However, Dorothy mysteriously disappears, and Ruby's search for her new friend lands her in the Underworld. Reunited with the heroes, Ruby teams up with Emma, Regina and Snow to continue looking for Dorothy. Meanwhile, Snow and David struggle with not being able to be with their son, Neal, and devise a plan so that one of them can escape the Underworld.

The episode was written by Andrew Chambliss & Bill Wolkoff and directed by Eriq La Salle.

"Ruby Slippers" episode of Once Upon a Time airs tonight at 8:00 p.m. EDT on ABC.

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