The gang go to the grand re-opening of Grimsley Mansion, where the living Black Knight armour and hidden treasure await.
- Frank Welker as Fred Jones and Scooby-Doo
- Matthew Lillard as Shaggy Rogers
- Grey Griffin as Daphne Blake
- Kate Micucci as Velma Dinkley
- Phil Morris as Phil (Treasure Hunter #1) and Adam
- Sean Schemmel as Charlie Grimsley and Treasure Hunter #2
- Jason Spisak as Kyle Grimsley
- Colleen O'Shaughnessey as Wanda Grimsley
- Oddly, this is not called "LEGO Scooby-Doo! Knight Time Terror", although it is advertised under that title.
- Phil is credited as "Treasure Hunter #1". The former name might be an allusion to his voice actor, Phil Morris.
- The gang's adventures continue in the feature-length DTV film, LEGO Scooby-Doo! Haunted Hollywood.
- No animation mistakes are known.
Inconsistencies, continuity errors and goofs/oddities
- "MENZA" should be spelt "MENSA", unless the misspelling was intentional.
- The fact that Augustus himself was supposed to have raised Eugene from a seed would mean the latter is over 100 years old.
In other languages
- Greek: Σκούμπι-Ντου! Νυχτερινός Τρόμος (Scooby-Doo! Nocturnal Terror)
- Polish: Scooby-Doo i Czarny Rycerz (Scooby-Doo and Black Knight)