In "Left Behind" the ladies save everyone through both intelligence and plain old ass kicking.
Individually in the episode:
Catherine poisons an entire room full of men who are after her and her children, without even putting the poison in the food. She also manages to stall as long as possible to keep anyone of her own from getting killed before the poison kicks in, and for the rest of the castle's residents to escape.
Mary stabs and kills a man with a fork straight in the neck, saving her own life and quite likely Catherine's.
Greer and Leith continuing to serve the guests while everyone else in the kitchen evacuates. After an enemy man finds them alone in the kitchen, a fight ensues, ending with Greer taking out their assailant by whacking him over the head with a frying pan. Earlier in the fight, she jumped on his back to keep him from hurting Leith any further. This is a girl who has been raised only to marry well and look pretty, and has never so much as fried an egg for herself at this point.
Mary showing how much of a queen she is when she plans a revolution against her mother and Francis' parents. She does this in reaction to the discovery that she had been tricked by both parties into signing a contract that gave Scotland to France in the event of her death without an heir.
Mary's Scottish countrymen laying down their swords before her and kneeling to her authority upon hearing her fury about the contract, and how far she was willing to go to save Scotland.
Kenna — vain, self-centered Kenna — puts her life on the line to get a copy of the contract out of Henry's rooms. She barely manages to find it and smuggle it out, all the while knowing that even if Henry didn't catch her stealing the contract, his recent madness could easily have led to her own death by kinky sex once she was found by him in his rooms, as had already happened to another young woman.
In "Higher Ground", Francis and a small handful of men pretty much single-handedly facilitating France's reclaiming of Calais. Francis gets several individual moments, such as going directly into the line of fire with the men, despite his rank, which should have kept him safely on the sidelines, being smart enough to notice in the chaos of battle that the enemy was far more shorthanded than they had appeared, and then keeps that composure and intelligence with him to figure out how to save everyone from a cannon attack. His men are awesome as well, running straight at the enemy to distract them, while Francis makes a perfect shot with one flaming arrow that hits the gunpowder around the cannon and takes out all the soldiers with it, clearing the path to Calais. If only his father could have seen how incredibly well his unfavored son did under pressure. It seems he has Catherine's brains and Henry's boldness.
A very welcome character has a smaller but still awesome role as well during the episode. Greer's beloved boyfriend/kitchen servant Leith reappears just in time to save Francis from a sword attack, and helps keep the rest of the men in their group steady, which helps Francis immensely. He even gets some awesomeness for getting up despite a severe injury and letting Francis help him. He would have let himself die if Francis hadn't gotten him to think of Greer. Doubles as a Crowning Moment of Heartwarming.
Mary and Francis tag-teaming an evil but badly needed noble to get him to do everything they want while still retaining evidence of his crimes, which he has no idea about.
Catherine's Rousing Speech about how Mary needs to keep on being a queen after being raped.