Michael Westmore is a psychopathic serial killer in the WB TV series Smallville, appearing as the main antagonist in the Season 5 episode "Tomb".
He was portrayed by Damon Johnson.
Michael was the son of a jeweler but was secretly a killer. In 1995, he murdered Gretchen Winters, a troubled teen, in the Talon apartment and buried her behind the bathroom wall. He placed on all his victims a bracelet with a green bejeweled meteor rock as he claimed it helped them be at peace.
Michael worked as an orderly at the Smallville Medical Center, and was ordered by Dr. Sydell to take Chloe Sullivan from ER into an observation room. Chloe had been possessed by Michael's victim, Gretchen whose spirit was haunting her.
While in the hospital, Chloe heard a voice begging for help coming from the bathroom in her hospital room. She panicked when she saw the ghost of Gretchen but was unseen to everyone else in the room. The doctors ordered Michael to restrain her for sedation.
Clark later helped Chloe escape the hospital and took her back to the Talon apartment. Sensing it wasn't safe there Clark took Chloe to the Kent Farm while Lois planned to investigate Gretchen's murder. While in the apartment, Lois encountered the hospital orderly, Michael Westmore who was standing at her door.
He claimed he was concerned for Chloe but Lois was suspicious. Michael muses that his father used to manage the Talon when it was a theater and Lois politely ushers him out. She tried to call the sheriff, but Michael forced his way back in and drugs Lois with chloroform until she passes out.
He then took Lois and tied her up in his basement. Chloe became fully possessed by Gretchen's spirit and went to Michael's house wanting revenge. She subdued him with a taser and almost bashed him to death until she heard Lois in the basement. Michael knocked her out and tied her to a chair next to Lois.
He terrorizes them and talks about how his father used to make bracelets with green gemstones. He puts one on Chloe and gives Lois a large knife, instructing her to slit her wrists, or he will shoot Chloe. Instead Lois throws the knife at Michael.
Enraged, he knocks her down and she falls unconscious and he stands up to stab her. Michael was about kill Lois when Clark arrived to fight him, but Clark was weakened by the kryptonite bracelet Michael put on Chloe's wrist earlier and got easily knocked to the ground.
Chloe called Michael "Mikey", a name that Gretchen used to call him. Michael was shocked after Gretchen revealed that it was her in Chloe's body. He touches the bracelet and Gretchen's spirit leaves Chloe and flies into Michael.
Gretchen's spirit transferred into Michael's body and she forced him to stab himself in the stomach and kill himself, despite his plea. Once Westmore was dead, Gretchen completed her revenge and her spirit disappeared.