Werewolves

Werewolves are supernatural creatures, human beings who bear the curse of lycanthropy and transform into giant wolfmen at night. Hammer produced only one werewolf film, The Curse Of The Werewolf (starring Oliver Reed), though werewolves are also mentioned many times in the Hammer Dracula series.

Overview
In the Curse of the Werewolf, werewolves are shown to be created when an unwanted child is born on Christmas Day. As this is the same day Jesus Christ was born, it is considered an insult to heaven for an unwanted child to be born on this day and it is therefore easier for demonic spirits to possess them. Once the demon has possessed the child then it can take control of them (transforming them into a giant wolf like creature) whenever negative emotions, such as anger and jealousy, are strong and on the night of the full moon, though positive emotions such as love and compassion can hold the spirit at bay. Whilst in their wolf form werewolves possess superhuman strength, enough to rip a massive steel door off its hinges and shred through solid steel with their claws. They also have superhuman agility and endurance, with only a weapon made from silver or fire being capable of destroying them. Like many werewolf legends, in their wolf form werewolves have no intelligence and are driven purely by their instincts to kill and feed. They also remain in their wolf form once they have been killed.

In the Dracula Film Series
In the Hammer Dracula film series, werewolves are implied to exist (though none are ever seen) in both Horror of Dracula and The Brides of Dracula. The villagers make reference to vampires and werewolves, and Dr Van Helsing also believes in werewolves and, it is hinted, may have had encounters with them. Lorrimer Van Helsing is also shown to have books on werewolves in his library on the occult.