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. Guest stars: Andrew Crawford as Sir Gawaine, Peter Bennett as Leonides, Brian Worth as Sir Kay, Paul Hansard as Sir Lionel, Edwin Richfield as Sir Christopher.

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. Guest star: Ballard Berkeley as Sir Urgan the Strong.

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. Guest star: Patrick McGoohan as Sir Glavin.

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 Squire Brian arrive, they are captured and King Mark attempts to persuade them to reveal the secret information. Guest stars: Nigel Green as King Mark, Douglas Argent as Prince Boudwin.

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.