1x01 - They Bite
Luke 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 Enchilada
Galvin 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 Grace
The 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 - Suckers
Bad 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.