 Sam Witwer portrays Davis Bloome , a paramedic for Metropolis General Hospital . He first appears in the season eight episode " Plastique " , assisting Chloe with helping an injured person after a bomb explosion . In the episode " Toxic " , Chloe calls on his help when Oliver is poisoned and refuses to be taken to a hospital . In " Prey " , Clark begins to suspect that Davis is a serial killer after he finds Davis unconscious at one of the murder scenes , and learns later that Davis is usually the first paramedic to arrive on similar scenes . Davis starts to suspect the same thing himself when he begins to lose track of large portions of time , and finds himself covered in blood , but with no wounds on his own body . Davis is informed by <unk> , the wife of General Zod , that after the pair learned they could not have children that he was genetically created to adapt to any injury and to be Earth 's ultimate destroyer . In " Abyss " , Davis confesses to Chloe that he is in love with her , and believes that she is marrying the wrong man ; as a result she asks him to not see her again . On Chloe 's wedding day , in the episode " Bride " , Davis transforms into the hulking monster called Doomsday , and travels to Smallville where he injures Jimmy and kidnaps Chloe . In the episode " Infamous " , Davis discovers that he can keep Doomsday from emerging if he kills , and subsequently begins choosing criminals as his victims . He subsequently learns that Chloe 's presence will also keep the monster at bay in the episode " Turbulence " , and in " Beast " Davis and Chloe leave town together so that Davis can keep Doomsday from coming out . In the season eight finale , Chloe uses black kryptonite to separate Davis from Doomsday , leaving him human ; when Davis discovers that Chloe does not love him he stabs Jimmy with a pipe . Before Davis can attack Chloe , Jimmy pushes him into a metal rod , which results in Davis 's death before Jimmy himself dies . 
