Maximelos and the Three Ogrons
From Tardis Wiki, the free Doctor Who reference
Maximelos and the Three Ogrons was a Gallifreyan fairy tale that the First Doctor heard as a child, before his initiation into the Time Lord Academy. One was too vicious, one was too stupid, and one was just right.
The Eleventh Doctor promised to tell Amy Pond the story. (PROSE: Nothing O'Clock)