When I ask Gayle Rankin if she knows Alys' full story on "House of the Dragon," she offers a look as enigmatic as the woman/witch?/ghost? — no one really knows yet — she plays on the HBO drama... and then she nods. Is the episode she references next week's Season 3 finale? What Rankin can say is that what she learned about Alys "all surprised me — that was what was so cool about it... In last week's episode, Alys spun Aemond a fantasy of repopulating the dream of Old Valyria, one white-blonde baby at a time.