 Series 1 comprised 4 episodes and was released in 2010.It featured the return of Sgt Quick (previously PC Quick), who appeared in "The Talons of Weng-Chiang", and the debut of Lisa Bowerman's Ellie Higson, a barmaid acquaintance of the pair.The series's main antagonist was the mysterious Dr. Tulp, who was previously mentioned in "The Mahogany Murderers".