Many of the angry mob of Star People outside Unseen University, and the customers in the Broken Drum during the fight scene, are Discworld fans recruited through fan websites and mailing lists.
The adaptation leaves out a subplot about an entire family of trolls with vibrant personalities, which also would have increased character development for Herrena the Henna Haired Harridan and her inept henchmen.
Liz May Brice later provided additional voices on Lego the Hobbit (2014), narrated by Christopher Lee.