Let this episode be a lesson to you youngsters: Sinkholes are not playgrounds. Nor are they happy portals to fairy-tale kingdoms. Henry would do well to figure this out, considering that his life ends up in danger while investigating a sinkhole in "That Still Small Voice." Meanwhile, the Sheriff deputizes Emma, and a flashback to the fairy-tale world shows how Jiminy Cricket once wanted to leave the "family business." "That Still Small Voice" will air on Sunday, November 27 at 8pm on ABC.