Sir Gadabout is a nightmare of the round table, his devotion to the task of protecting King Arthur undermined by constant blundering. The Teddy-hugging Arthur is under attack from the imbecilic Sir Rancid and his wickedly scheming accomplice Nanny, whose mutual intention is to smash Camelot 'to smithereens'. Princess Elenora, teenage daughter of King Arthur, is far smarter than her father and smitten with (in the first series) young lad Will, who becomes squire to Gadabout and then (in the second) Gadabout's new and rather mysterious Spanish squire Juan Carlos Felipe.

The show was based on the series of Sir Gadabout books by Martyn Beardsley.