Here are only a few of the many instances where Detective Knight has been caught saying things that make his psychological stability appear to be, how shall we say, in question...
*In this first example, Detective Knight was overheard telling Medical Examiner Natalie Lambert that he believed himself to "be" a small bejewled figurine called the Black Buddah which he held responsible for a series of incidents, including the explosion that killed his former partner, Detective Don Schanke, and Captain Amanda Cohen.
*Here we have Detective Knight recorded covertly in an underground night club known as Raven. He can be overheard arguing with a shady character known to the Metro Toronto Police Department only as LaCroix, over whether or not LaCroix will take him to see an exorcist.
*And finally, here's a clip of Detective Knight talking to himself wherein he calls himself by a rather interesting name, then quotes an obscure musical reference.
Preliminary Conclusions: As we can see from these early findings, Detective Nick Knight is in need of some close observation!