Written by Old Bluffer 1st Feb 2007
Kindly written by Chris Gray
Count Orlok sends a magic letter to Knock, who reads it and promptly falls under his master's command. He gradually descends into "acute mania" and is confined to a prison. He begins to eat flies and chants "Blood is life! Blood is life!".
As Orlok arrives in Wisborg, pretending to be catatonic; Knock attacks and murders a distracted guard and escapes the prison. Word of mouth gets out of hand and Knock is blamed for the town's plague and accused of being a vampire. A mob hunts him through the streets and surrounding countryside but he eventually eludes them. Some time after the mob recaptures Knock and (naturally) safely returns him to prison.


Locking up the elderly because they have Dickensian hair just seems a bit harsh...
At dawn he senses his master's despair and tries in vain to escape through the barred window to save him. Two guards subdue him and tie him up to a point of incapacitation. Sensing his master's demise, life escapes him, his head bows and he dies.


Nothing paranormal here, this is a clear case of police brutality and a postmortem would reveal death by asphyxiation due to overly enthusiatic binding!
Not having seen this film, I'm not sure about which categories should apply.
I assume he is spiritually bound to Orlok, so dies with him - but I've put "unique" for now.
Yeah he's basically under a spell, so it's hard to say how it works with master/slave.
I was always under the impression Nosferatu's crazy man-slaave just carried on being crazy after Orlock died.`
His death scene is the very next scene after Orlock fights The Sun so you're probably right, although he admittedly didn't have much time for introspection.
I've never seen the film myself, but I did see the action figures put out by Silent Screamers, which gave Knock the surname 'Renfield,' apparently to bring him a little more in line with the Dracula mythos.