Jennifer Maas TV Business WriterSPOILER ALERT: Do not read if you have not watched “Fairytale Wedding,” the Feb. 28 episode of NBC’s “The Endgame.”NBC’s new high-octane crime drama “The Endgame” aired its second episode Monday, revealing many more compelling details about its leading ladies — Morena Baccarin’s international arms dealer/crime boss Elena Federova and Ryan Michelle Bathé’s FBI agent Val Turner — than it did in its week-ago series premiere.In the episode, “Fairytale Wedding,” we saw the titular nuptials go up in flames when the church where Elena and her now-husband Sergey Vodianov (Costa Ronin) were to be wed was blown up with everyone they loved inside.