Flight of Fancy

Diggs is a limited time questline released on March 5, 2014 for the Season 25 "double-episode" promotional for the episodes 'Diggs' and 'The Man Who Grew Too Much'. This is not actually a quest but does unlock Freedom.

Diggs
"Check out the Build Menu to find a Limited Time pet Falcon linked to the brand new double-epiosde of The Simpsons on Sunday, 9/7c on FOX."

- In Game Message