New Blood was the seventh episode (not counting the Christmas Special) of the second series of Doctor Who Rebirth. It takes place in New York City during the premier of Bela Lugosi's Dracula film in 1931. An unknown assailment is murdering employees through-out the theater and the only trace is bite marks on their necks.

This episode features Zygons for the first time in Doctor Who Rebirth, and showcases some of the Tenth Doctor's maniupulative tendencies.