King Arthur's Disasters S02E07 - The Salmon of Knowledge

Princess Guinevere wants to choose a husband wisely and King Arthur volunteers to travel to Ireland and bring back the legendary Salmon of Knowledge. His efforts are hampered by Robin Hood and his Merry Band, numerous Leprechauns and two Merlin clones. Undaunted, he returns with the fabled fish – which is accidentally eaten by Alan, who becomes the wisest horse in the Kingdom.