The Stooges are troubadours in medieval times. The villainous Black Prince has designs on marriage to Elaine, the princess. She however is in love with Cedric, the blacksmith. The Stooges try to intervene for Cedric by serenading Elaine. They are captured by the king's guards and condemned to be beheaded. Elaine sends them tools baked in a loaf of bread and they escape the dungeon.
While running from the guards, Moe overhears the Black Prince plotting with a co-conspirator to murder the king. The Stooges save the day by causing a diversion by dancing in armor to Stephen Foster's "Old Folks at Home", thus allowing Elaine to free Cedric. Finally, the king realizes the plot and jails the Black Prince and his fellow plotter. Elaine is allowed to marry Cedric, and they all live happily ever after.
- Moe Howard
- Larry Fine
- Shemp Howard
- Christine McIntyre, as Princess Elaine
- Vernon Dent, as the King
- Philip Van Zandt, as Black Prince (Antagonist)
- Jock Mahoney, as Cedric the Blacksmith
- Squareheads of the Round Table was later remade with the Stooges short film Knutzy Knights, which had also featured Shemp Howard as the Third Stooge.
- In the chase sequence right after the Stooges escape the dungeon, the emblem on the two guard's tabards are different from how it had been for the whole episode uptil then.