In “Spencer” — the third leg in a November Diana trilogy that includes Season Four of “The Crown,” now on DVD, and “Diana: The Musical,” now on Broadway — director Pablo Larrain does for the late Princess of Wales what he did for Jacqueline Kennedy Onassis in “Jackie” (2016) : He imagines a goddess at a tipping point.
Read MoreDiana, Princess of Wales in Russia in 1995. Photograph by Nick Parfjonov.