“The Demon of the End” (season 3, episode 10)

“The Demon of the End” begins on a somber note: after being freed from a Chinese prison, Grace returns to New York under the protection of the Catholic Church. But it’s not enough to shield her from Leland, who goes after her when she makes an enigmatic drawing for Kristen that alludes to Andy’s imprisonment. Grace survives, but Monsignor Korecki, a priest that’s been helping her, is killed—something even she wasn’t able to foresee—and she’s whisked away by the Vatican.
Then, as Edward is Skyping Kristen to let him know of Andy’s untimely demise, Kristen’s daughters use their computer game to discover that Leland is somehow involved—and it’s enough to spook Andy’s captors into letting him go. Kristen is devastated until Andy suddenly appears at their front door with no memory of his ordeal, though something is decidedly off. He’s now seeing demons, for instance.
And about that missing egg. After a false lead, Kristen—who learned in an earlier episode that Leland’s been targeting her all this time because of her connection to RSM Fertility, and because he believes Lexis is a demonic heir—discovers her egg was recently sold. When Kristen goes to the buyer’s address—surprise! It’s Sheryl’s office. In a cross-cut scene, David receives a vision: an angel telling him “38 days… woe to Babylon.” Kristen realizes she’s arrived in the middle of a baby shower for a very pregnant woman (a woman who looks to be due in, oh, 38 days). A look of dread comes over her face as Leland appears, turns to Kristen, and crows, “We’re going to be parents!”
Season four arrives May 23, and there’s already lots in motion—but that Satanic baby is definitely going to lead the charge.