And In response, for once, you can see Margaret fully support Elizabeth as queen (a spotlight position The Crown's Margaret has always believed she deserved more). Margaret is the one who urges Elizabeth to lead her 1977 jubilee, a celebration of her 25th anniversary of being queen, and reminds her sister of her primacy in British life. “You cannot flinch. Because if you show a single crack, we’ll see it isn’t a crack, but a chasm.” Margaret tells Elizabeth. “There is only on queen.” It’s these words that push Elizabeth to close season 3 — and head into season 4 — with her head held, despite the current mayhem in UK politics