Created by Julian Jones and Lucy Watkins, Hex was a TV series that explored the supernatural. It ran for two seasons (19 episodes) between 2004 and 2005. Hex was set in a remote English school called Medenham Hall where as it happens was built on the site of what was known as the McBain estate, where back in the 18th-century there a witchcraft scandal in which the female members of the line, the Medenham Witches, were tried and executed.
In the present we meet Cassie (Christina Cole), who is off to attend Medenham Hall. She is a young girl who has raised herself whilst caring for her mentally unstable mother (Geraldine James). Cassie has latent telekinetic, pyrokinetic and clairvoyant abilities that are awakened when she touches an antique vase that had been used in Voodoo rituals by the Medenham Witches. At Medenham Hall, Cassie is roomed with Thelma (Jemima Rooper). Thelma has a crush on Cassie and soon discovers she is a descendant of the Medenham Witches.
As her time at Medenham Hall continues Cassie has startling visions and dreams that she struggles to interpret. Also her telekinetic and pyrokinetic powers become more powerful in ways she cannot control yet she is only able to summon in times of stress.
Cassie soon begins being followed by a man named Azazeal (Michael Fassbender). We do not see much of Azazeal to begin with but as the stalking continues he is revealed to be the leader of the biblical Nephilim, fallen angels, and he claims to be in love with Cassie. It turns out that Azazeal has had previous relationships with schoolmistress Jo Watkins (Anna Wilson-Jones) and Cassie’s own mother, which may have contributed to her mental illness.
Azazeal grows angry at Cassie the more she refuses to believe his claims so he kills Thelma in front of Cassie. It turns out by sacrificing Thelma in this way his powers were increased. Thelma’s murder though, has unexpected results. firstly it weakens Azazeal’s hold on Cassie and secondly it turns Thelma into a ghost who can only be seen by Cassie, Azazeal and other ghosts. As you can imagine, Thelma never forgives Azazeal for her killing her, and is a strong voice against him to Cassie, who has grown to have feelings for him. Thelma is unable to touch the living, but she can touch other ghosts and manipulate inanimate objects and eat, which she does constantly (since ghosts cannot gain weight). Thelma works behind the scenes to spy on Azazeal and gather evidence from places where Cassie cannot enter. Cassie, while horrified by some of Azazeal’s behaviour, ultimately finds herself drawn into his power. Azazeal possesses Cassie, and while under his power, she gives herself to him and they conceive a child.
As the series develops, Thelma learns from Peggy (the ghost of a woman who died in the 1918 influenza pandemic), that Azazeal’s child’s conception is weakening the veil between worlds, allowing more ghosts to appear to the living. If the child is born, the veil will be torn, allowing the rest of the Nephilim to enter our world. If the pregnancy is terminated, the veil will heal, preventing the Nephilim from returning and leaving Azazeal the only one of his kind in our world. If they do this though – ghosts will also vanish from this world.
Cassie, after much convincing from Thelma decides that her fetus must be aborted, although it is growing at an alarming rate. A week after conception, the doctors believe she is nearing the end of her second trimester. Thelma assists Cassie, without telling her that success means that she may never see Cassie again. Azazeal tries to interfere and save his son, but Cassie goes through with the abortion…or so she thinks. When Thelma realizes that Cassie can still see her, Thelma knows that something has not gone right. Cassie discovers weeks later that the doctor who performed her procedure has been influenced by Azazeal, and that the baby is alive and in Azazeal’s care.
As Season 2 begins, Thelma discovers that Azazeal is raising the child, who is walking already, in an abandoned nearby church. She and Cassie decide that they must somehow get the child, whom Azazeal has named “Malachi”, but are clueless as to how to accomplish this. Azazeal becomes aware that they are watching him and tries to convince Cassie that he only wants her to join them so that they can be a “real family”. Cassie, still partially under his spell, is obviously attracted by the prospect but retains enough of herself to know that this is something she should not want.
Also a new student arrives at Medenham called Ella Dee (Laura Pyper). Thelma is mildly attracted to Ella Dee until she realises that Ella can see her. Questions are asked when it is discovered that Ella’s tuition is paid by a corporation and her family background is unknown. She also seems to know entirely too much about Cassie… and Azazeal…