A sound recordist fell into the moat while shooting the scenes of K-9 in the boat.
Director Michael Hayes recounts on the DVD audio commentary that his 14-year-old son Patrick was in the rowing boat with K9, attempting to navigate it.
David Fisher liked Count Grendel so much that he had the villain escape at the end of the story in the hope that he could be used again.
This episode was watched by 9 million viewers on its original transmission.
First time the Tracer has been used to track a segment of the Key to Time after its conversion.