Complete Monster: The Warlock is an Evil Sorcerer who serves Satan, doing whatever heinous acts are necessary to gain more power. His plan is to re-assemble the Grand Grimoire, a Satanic book which he can use to undo all of Creation and for which the Devil will reward him with untold powers. In the 17th century, he escapes from Giles Redferne into the 20th century to complete his task. After being taken in by Kassandra and Chas upon his arrival, he chops off Chas's fingers and bites out his tongue to kill him. He uses an unwitting medium to channel his master and then carves out her eyes to use as a compass. He casts a Rapid Aging curse on Kassandra to extend her suffering by seeing her own life go by in a matter of days, skins a child and boils it down for the fat so he can use it in a flying spell; and threatens to kill a priest's unborn children to compel him to provide the location of the last pages of the Grimoire.
Evil Is Sexy: The Warlock's good looks tend to be commented upon, and he uses that to his advantage.
Family-Unfriendly Aesop: This film features a very disturbing way of showing kids just why they should never talk to strangers.
"Funny Aneurysm" Moment: Post-9/11, Redferne being able to get past airport security and onto a plane carrying a four-foot-long, sharp-tipped, wrought iron weather vane becomes less funny.