Cinderella (1950 film) overhears Cinderella humming the waltz played at the ball. Realizing that Cinderella is the mysterious girl, Lady Tremaine locks her in her attic bedroom. Later, the Duke arrives at the château, and Jaq and Gus steal the key from Lady Tremaine's dress pocket and take it up to the attic as Anastasia and Drizella unsuccessfully try on the slipper. Lady Tremaine's cat, Lucifer, ambushes the mice, but Bruno chases him out of the house, allowing the mice to free Cinderella. As the Duke is about to leave, Cinderella appears and asks to try on the slipper. Knowing it will fit,
Wake Up Call (Once Upon a Time) agreed to help her. Regina starts training Drizella but after series of failures, Drizella’s talents finally come through when she rescued Regina from a falling tower. The training also captured the attention of Rumpelstiltskin, who showed up to remind Regina that, just as the Evil Queen was virtually omniscient, so too must be Lady Tremaine. Heeding those words, Regina eavesdrop on Tremaine and discovers that she plans to take Drizella’s heart and place it in Anastasia after failing to get Henry’s heart, leading Regina to suspect that Drizella plans to kill her mother. Drizella wants Regina to help her but