Moments later, on the city wall, Tyrion and Joffrey began to argue as Stannis' ships sailed closer.
"What are you doing?! We need to attack them!" Joffrey cried.
But Tyrion had other plans.
He sent out a lone ship, dumping the wildfire potion in the bay, to meet the large fleet. By the time the ship reached Davos, the bay was practically a tinderbox.
Bronn let loose a fiery arrow, which caused huge explosions and destroying Stannis' fleet. (I was rooting for Stannis, but, damn, that was awesome.)
Undeterred, Stannis urged his army to press on.
"The dwarf has played his little trick," he said, sternly and judgmentally.
"Hundreds will die," one of his advisors objected.
"Thousands," Stannis replied (!). (That's one cold, hard dude.)
"Come with me and take this city!" he shouted and his surviving troops began to rush on the shore.
Meanwhile, Sansa was ordered to join Cersei to wait out the battle in a small holding room inside The Red Keep. There, Cersei was getting drunk and commanded Sansa to drink with her. She told her future daughter-in-law that she would have tried to seduce Stannis were he not so morally rigid.
"I'd have a better chance of seducing his horse," she said, before telling the young girl: "Tears aren't a woman's only weapon. The best one is between your legs. Learn how to use it."
She also told Sansa that she's placed her executioner Ilyn Payne (who chopped of Sansa's dad's head) in that room to have them killed should the city fall to Stannis.
As they were talking, Stannis and his troops rushed ashore as fire arrows rained down among them. Someone threw a large rock that crushed a Baratheon soldier's head, as The Hound led the Lannister troops out to the fight on the beach. He ever so politely threatened to defile the corpses of any man who didn't make a killing before dying, and then began to eviscerate Stannis' soldiers.
But then all the fire began to get to the psychologically-damaged Sandor Clegan, whose brother, The Mountain, had burned off half his face as a child. A man who had been set on fire charged The Hound, who froze, but was rescued by Bronn, who shot the attacker in the eye with an arrow.
Stannis' men began to ram the gates of King's Landing, and put up ladders to scale the walls. Stannis, himself, proved adept with a sword, cutting down those who stood in his way, including handing out some of the most brutal beheadings we've seen this season. (Take note, Theon Greyjoy.)
As the fire blazed, The Hound turned coward and quit the battle, cursing at Joffrey ("F--- the king!") as the boy commanded him to return to fighting.
Inside the gates, a pivotal moment occurred. Joffrey was brought news that his mother wanted him to retreat to the holding area, while Tyrion implored the king to lead the men in battle. The scared little king retreated, of course, leaving Tryion to lead the attack.
"They say I am half of man but what does that make the lot of you?" the dwarf shouted to those soldiers who wanted to retreat. "Those are brave men knocking at our door. Let's go kill them!"
Tyrion then led the men through one of the Targaryen tunnels and took Stannis' troops from the rear. He even somewhat-awesomely chopped off a man's leg with his axe.
But amid the fighting, one of Joffrey's guards, Ser Mandon Moore, betrayed Tyrion, cutting The Hand's face badly and leaving him unconscious. Tyrion's squire, Podrick Payne, intervened and saved his master's life, killing Moore.
Another wave of Stannis' large number of troops then joined the battle and hope looked lost for the Lannisters, until ...
Lord Tywin, Tyrion's father, came riding in with his troops. He was joined by the Tyrells (who were previously pledged to Renly Baratheon) and their troops.
Cersei had moved to The Iron Throne and was preparing to die. She was about to give poison to her youngest son, Tommen, when Tywin burst through the doors.
"The battle is over," he said. "We have won."