Arthur remembers his past. Mordred murdered King Uther, caused his mother's death, stole the throne, and hunted Arthur. Merlin hid Arthur and trained him for twenty years. In the present armory, Arthur channels power and swears vengeance. At the palace gate, Mordred commands Agravain to win the King's Sword in Avalon and threatens Arthur with death. On the road, Agravain stops his horse and orders Arthur to clean his boots.
A flashback recounts how Mordred murdered King Uther and drove Arthur's mother to her death. Mordred took the crown of Albion and hunted the young prince. Merlin kept Arthur safe and spent twenty years secretly teaching him magic.
01:09: Arthur Swears Vengeance in Secret
Arthur stands alone inside the palace armory. He summons a pool of magic into his open hand. He swears to reclaim his rightful place and execute every traitor who made alliances with the dragons.
01:23: Mordred Threatens Arthur at the Gate
At the Sun Spear Gate, King Mordred speaks to Prince Agravain. He tells his son to secure the championship and bring back the King's Sword. Mordred warns Arthur that he will bury him alive if he ever crosses the prince.
02:08: Agravain Demands Arthur Clean Boots
The group travels through the countryside toward Avalon. Agravain rides high on a horse while Arthur walks on foot along the dirt. Agravain pulls the reins, points at his mud-splattered boots, and commands Arthur to drop down and wipe them.
Key Lines from Episode 4
“And every traitor who crawled into bed with the dragons will die by King Arthur's blade!”
“My son, you will win the championship this time, and bring the King's Sword back for me.”
“As my son's servant, if you dare do anything to cross my son, I'll bury you where no one will ever find you!”
“My boots are covered in mud. See that? Kneel down and clean them.”
How Episode 4 Ends
On the muddy countryside road, Agravain halts his horse and sticks out his dirty footwear. He orders Arthur to drop to his knees and wipe the mud away. Will Arthur swallow his pride and clean the boots to protect his cover, or will he strike back against the arrogant prince?