Sir Lancelot is challenged by the other knights before he can become a member of King Arthur's Knights of the Round Table. He has to prove his worth and is put through a series of rigorous tests.
Sir Lancelot goes to the rescue of Urgan the Strong, whose castle is besieged by Sir Melius the Mighty and his two sons. Sir Lancelot drives off the invaders, and Urgan offers his daughter Igrane in marriage to the knight as a reward for his bravery.
Queen Guinevere is kidnapped by King Arthur's cousin, Sir Mordred. He and his father, King Pell, demand King Arthur's kingdom in exchange for the queen's life.
When Sir Lancelot requests that his squire be trained to become a knight of the Round Table, he meets with considerable opposition.
King Arthur entrusts Sir Lancelot with a secret battle plan for Prince Boudwin. The Prince is besieged in his castle by King Mark and is badly in need of help. When Sir Lancelot and his squire Brian arrive to help they are captured and King Mark attempts to persuade them to reveal the secret information.
Sir Bliant's three sons decide to break the truce King Arthur arranged between their father and Sir Rolf. They carry Sir Rolf's three daughters away as hostages and the distraught father comes to King Arthur for aid.
King Arthur and his men set off to capture a band of pirates, believing they are hiding out in a coastal town. Actually, the pirates are just waiting for them to leave so they can raid the castle.
A cowardly knight wants to rescue a lady who is imprisoned by her brother. He comes to King Arthur, for advice on how to become courageous. Merlin instills confidence in the young knight by lending him Sir Lancelot's weapon and telling him it is a magic sword.
Lancelot is banished from Camelot because King Arthur thinks he made a false claim against King Marhaus. Outside Camelot, Lancelot encounters Marhaus and discovers and evil plot.
Sir Lancelot and his squire Brian go to the aid of King Boltan, who swears that ghosts have abducted his daughter.
While Sir Lancelot is on a mission for King Arthur, he is robbed and his horse is killed by a group of wild warriors.
On St. Stephen's Day, King Arthur and his knights traditionally change places for one day with the court squires. During the day, one of the ""squires-for-a-day"" steals the Sword of Excalibur.
A young knight's prospective father-in-law has been kidnapped and is being held prisoner. Sir Lancelot agrees to help the knight rescue the man.
A band of renegade knights is preying on the shepherds in the area. Sir Lancelot decides to champion the shepherds' cause, and masquerades as a shepherd to teach them how to fight the knights off.
Sir Lancelot volunteers to defend an abbey and its occupants from invading Danes.
As a punishment because he rebels at working with Merlin's pigeons, Squire Brian is sent on an errand to deliver a crate of pigeons to a neighboring castle. En route, he becomes involved with a gang of thieves who stole the precious Ruby of Radnor.
King Arthur learns that a nearby village is being terrorized by a horrible monster. Sir Lancelot is sent to investigate. He discovers that the monster is really a Viking boat, and that it's the Vikings who are doing the terrorizing.
A woman claiming mystical powers has convinced King Bors of Sagitaw that she is working evil against him. Sir Lancelot enlists Merlin's aid against her powers.
King Arthur gives Sir Lancelot a new name and sends him off to champion a lady who is being forced into marrying an unscrupulous man.
A young girl asks Sir Lancelot's aid. An evil monarch, King Meliot, is selling the young men of the village of Cheddar into slavery.
After their father dies, two sisters inherit his tiny impoverished kingdom. Their guardian is eager to set up a rich marriage for the older girl, but she is not willing.
Sir Richard of Taunton is attacked and beaten by three men and left for dead. His uncle plans to substitute his son, Richard's double, and gain control of the family estate. Lancelot is suspicious and starts investigating.
The Lady Lilith has been running the castle of Goodhue since it was left to her by the late Sir William , when she was 14 years old. But now Sir Liones petitions for a ruling at the court of King Arthur, quoting the law that no property can be inherited by a woman - which sets King Arthur a difficult choice to make. He suggests that the best solution would be for Sir Liones to marry the Lady, but apparently that is not possible.
While preparing for knighthood, Squire Brian uncovers a plot by King Marhaus. The king plans to break a treaty and take over a village.
While on a visit to castle Lamorack, Sir Lancelot and Merlin try to help their host when he receives a note threatening his daughter's life. Merlin learns that the note is false, and written by the girl herself in a bid for attention. Later the girl disappears. Another notes arrives and this time it's genuine.
After the death of a knight of the Round Table, a young man enters a tournament that will decide who will fill the vacancy. But the other knights object to the young contestant because of his shabby appearance. Sir Lancelot intercedes for him.
When a king breaks a treaty between his country and a tribe of women, his sister is taken hostage. Sir Lancelot sets forth to rescue the princess.
While visiting Mortaise Castle, Queen Guinevere is presented with a priceless jewel from the Rajah of Kaipur. Shortly afterward there is a fire, and during the excitement the jewel is stolen.
King Arthur and Sir Lancelot disguise themselves as thieves in order to test the validity of a statement by Lancelot. The knight believes that the thieves of the kingdom are thieves only because they are starving.
A prince in love with King Anguish's daughter Kathleen, is banished from the court because he possesses nothing but the ability to write rhymes. Sir Lancelot, hearing of the young couple's plight, travels to Anguish's court to help them.