Coming up during this spring's Sweeps period on Days of Our Lives...

Four top characters — Philip, Shawn, Chloe and Belle — will hop a private jet to Ireland to find Belle's kidnapped daughter. And go figure: Philip adds to the stress on board by demanding Belle choose once and for all between Shawn and him.

"Could there be worse timing?" Martha Madison says, with a laugh. The actress, who plays the freaked-out mom, promises a "huge reveal in Ireland that will tie up over 20 years of story and explain why the DiMeras have such a vendetta against the Bradys."

Also, we finally learn the true identity of Belle's father, John Black (Drake Hogestyn).

"It'll change everything in a big way," Madison teases. "Belle's gonna be a DiMera! Who'da thought?"

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.