In Homecoming, the narrative fiction podcast turned Julia Roberts-starring Amazon TV series, Titanic Rising is a joke. It's a made-up movie, a nonexistent sequel to James Cameron's 1997 blockbuster Titanic. In an elaborate prank, one soldier convinces another that Titanic Rising really exists. But as the show continues, the significance of Titanic Rising changes. It becomes something tragic -- a symbol of irreparable loss, a warning about meddling with forces we don't quite understand, a marker of the kind of slow decline we don't even notice until it's too late.