1x01 - They BiteLuke Rutherford is an average teenager – until his dead father's best friend, Rupert Galvin, enters his life. Galvin has come to tell Luke that he is the great-grandson of the legendary
Abraham Van Helsing. Luke's destiny is to fight against the supernatural entities swarming the earth. But half-life Gladiolus Thrip (Mackenzie Crook) has discovered Luke's secret as well.
1x02 - The Whole EnchiladaGalvin thinks that a girl's disappearance is down to the ancient demon, Gilgamel, a fear confirmed by the priest Father Simeon (Richard Wilson). Gilgamel feasts on innocent souls, whilst masquerading as an
angel. As more and more children disappear at the hands of the demon, including Ruby's younger brother, Galvin and Luke decide to summon the demon in order to defeat it.
1x03 - Saving GraceThe return of Galvin's wife's murderer, Tobias Tibbs (Kevin McNally) sets the vampire hunter on a path of vengeance. This leads to Galvin breaking into Tibbs' lair and having to be rescued from a group of half-lives. Thirst for revenge still not quenched, he and Luke find themselves walking into a trap. Ruby finds herself in a race against time to defuse a bomb placed in the Stacks by Tibbs, and with the help of Mina, must find Luke and Galvin before they succumb to a watery fate.
1x04 - SuckersBad boy vampire Quincey (Ciaran McMenamin) is on the scene and causing havoc around London with his band of half-life misfits. Galvin and Luke must stop him, but there is more to Quincey than meets the eye. Luke discovers that Mina is a vampire, and that Quincey is in fact her own son.