Once Upon a Time in Wonderland is an American fantasy-drama series that aired on ABC from October 10, 2013, to April 3, 2014. A spin-off of Once Upon a Time, it was created by Edward Kitsis, Adam Horowitz, Zack Estrin, and Jane Espenson for ABC Studios. Inspired by the Lewis Carroll novels Alice's Adventures in Wonderland (1865) and Through the Looking-Glass (1871), the series takes place in Once Upon a Time's iteration of Wonderland, and follows the same setting as the parent series, including the use of Disney and Lost allusions. In addition, the series features occasional crossovers with Once Upon a Time that involve connections with the characters that are trapped in Storybrooke, Maine.

Wonderland received mixed to positive reviews from critics, who praised its cast, visuals, and narrative, but criticized the plot. On March 27, 2014, the series was canceled after one season, with the finale airing on April 3. Actor Michael Socha, in his Wonderland role as Will Scarlet / Knave of Hearts, joined Once Upon a Time as a series regular for its fourth season.