Abbot Costello's name is a reference to the comedy team Bud Abbott and Lou Costello, Brother Everly's is one to the duo The Everly Brothers, and Prior Richard's is to actor Richard Pryor.
This is an 11-minute episode; it originally aired in the U.S. along with the season 4 segment "The White Knight," while internationally it was coupled with the season 5 segment "Never Give a Gummi an Even Break" (since seasons 5 and 6 each had an odd number of 11-minute segments).