Theory:K9 television discontinuity and plot holes/Fear Itself


 * When K-9 and the gang go to the junkyard to investigate, Darius's reaction suggests that he wasn't expecting CCPC's to be patrolling. However they were seen when the two strange men were being interviewed.


 * When Gryffen uses the Plague of 1665 as an example of the spread of fear. He states that the people were so frightened they set fire to London. However the cause is widely known as a fire in Pudding Lane and the exact cause in the Whoniverse is that the Doctor caused the fire to stop the Terileptils.