[1] Harker is a recently qualified solicitor from Exeter, who is deputed by his employer, Mr. Hawkins, to act as an estate agent for a foreign client named Count Dracula who wishes to move to London.

Harker discovers in Carfax, near Purfleet, Essex, a dwelling which suits the client's requirements and travels to Transylvania by train in order to consult with him about it.

He suffers a nervous breakdown after his experiences with the vampires; his fiancée, Mina Murray, comes to nurse him back to health with the nuns' help, and marries him there.

While he promises her that he will put her out of her misery if she falls completely under Dracula's control, in the privacy of his journal he writes that, if she did become a vampire, he would become one himself just so he could continue to be with her.

In a postscript note set seven years later, it is revealed that Harker and Mina have a son whom they have named after all four members of the party, but whom they call Quincey, after Morris, who sacrificed his life to help them destroy Dracula.