St. Paul's Hospital in Vancouver, Canada is used for the hospital exterior shots.
William Morgan Shepard, who plays 'Dr. Zito' in two episodes of "MacGyver" (1985), is the father of actor Mark Sheppard, who played 'Fake Dr. Zito' in one episode of the reboot series "MacGyver" (2016).
When the killer takes a spoon and tests out the Phosphorus he's going to use in the elaborate murder of Murphy, it ignites from the ambient O2 and then he throws it on the ground and stomps it out. That would not work. Do not try to stomp out a Phosphorus fire would only burn your foot.
W. Morgan Sheppard (Dr. Zito) mentions Odin and Valhalla while guiding/manipulating Eric. Sheppard voiced Odin in the cartoon Disney's Gargoyles (1996)