ZELENA IS PLANNING A DARK SURPRISE FOR DAVID, AND IN THE FAIRY TALE LAND OF THE PAST, PRINCE CHARMING MUST HELP RAPUNZEL CONFRONT HER FEARS IN ORDER FOR HER TO BE FREE FROM HER TOWER IMPRISONMENT, ON ABC'S "ONCE UPON A TIME"

Rebecca Mader ("Lost") Guest Stars as Zelena

"The Tower" - While Emma, David, Regina and Hook continue their search for the Wicked Witch, she, in turn, is planning a dark surprise for David, and Zelena's prisoner is powerless under her watch as she plots her next course of action against the townspeople. Meanwhile, in the Fairy Tale Land that was in the previous year, Prince Charming stumbles upon Rapunzel, who is trapped inside a tower, and must help her confront her fears in order for her to be free, on "Once Upon a Time," SUNDAY, MARCH 23 (8:00-9:00 p.m., ET) on the ABC Television Network.

"Once Upon a Time" stars Ginnifer Goodwin as Snow White/Mary Margaret, Jennifer Morrison as Emma Swan, Lana Parrilla as the Evil Queen/Regina, Josh Dallas as Prince Charming/David, Emilie de Ravin as Belle, Colin O'Donoghue as Hook, Michael Raymond-James as Baelfire/Neal Cassidy, Jared S. Gilmore as Henry Mills and Robert Carlyle as Rumplestiltskin/Mr. Gold.

Guest starring are Raphael Sbarge as Archie Hopper/Jiminy Cricket, Rebecca Mader as Zelena, Sean Maguire as Robin Hood and Alexandra Metz as Rapunzel.

"The Tower" was written by Robert Hull and directed by Ralph Hemecker.

"Once Upon a Time" is broadcast in 720 Progressive (720P), ABC's selected HDTV format with a 5.1 channel surround sound. This program carries a TV-PG,V parental guideline.

For more information on "Once Upon a Time," visit ABC.com/Once