Agent Carter was a U.S. Government Agent and a supporting antagonist in Season 7 of the WB/CW TV series Smallville.
He was portrayed by Kim Coates who also portrayed Tig Trager in Sons of Anarchy, Zachariah Kull in the Scream Team, Bennett Sinclair in Resident Evil: Afterlife, Hector in Tangled: The Series and The Watchman in Hostage.
Carter worked for the Department of Domestic Security that investigated suspected extraterrestrial activity in Smallville. Carter and his department first came to Smallville when an alien spacecraft was discovered following the flooding from Reeves Dam. Carter had his men kill the park rangers who discovered it and took it to a secret facility for testing.
At the government laboratory, Carter ordered his team of technicians to open the ship, but something went wrong. He instructs that the extraction protocols have been activated and he tells everyone to get out. The ship belonged to Kara Zor-El of Krypton and with help from her cousin Kal-El, they found the ship in the abandoned bay.
Lois Lane had been following the story and found the ship first but when she touches the Kryptonian glyphs, she was hit with a force of energy and was blown back unconscious. Clark and Kara arrived and as he went to Lois' side, Kara stopped the ship's explosion with her body, but to her confusion, the ship disappeared.
After the ship's destruction, Kara warned Clark about a blue crystal that was in her ship and that only a Kryptonian could destroy it, so it would have survived the explosion. In Washington D.C., Carter had obtained the crystal and was delivering it to the U.S. Department of Domestic Security.
At LuthorCorp, Agent Carter has arrived to talk with Lex Luthor, who had supposedly seen the ship's occupant. Agent Carter intended to have his men search for the woman in Lex's drawing. At the Luthor Mansion, Lex feigned ignorance and said the woman he was looking for doesn't exist and that she was just a fantasy. He gave information on other events happening in Smallville to Carter.
Agent Carter later supervised the blue crystal being analyzed in a lab when one lab technicians reports that seven percent of the material in the crystal is unidentifiable. As the crystal was locked up in a chamber, Lex Luthor entered the building and accuses Carter of stealing something from the spacecraft without telling him.
Carter stated the information is classified, but Lex doesn't care. He says he will eventually find out what Carter is hiding. After Lex left, Carter and his scientists continue examining the crystal.
Kara was in Washington and discovered the crystal's location from one of Carter's lab assistants. Her research brought up a LuthorCorp defense contractor called LX Dynamics and Kara went to the Luthor Mansion where she x-rays the wall and saw a safe. She suddenly fell ill and sees Carter standing behind her with kryptonite handcuffs.
After seeing how meteor rocks disabled her ship, he figured it might do the same to the passenger. Lex enters the room and Carter pulls out a gun, accusing him of working with Kara and stealing his property. Lex wonders what he did to Kara. Carter shoots Lex with the tranquilizer gun and leads Kara away.
Clark enters Lex's mansion, where Lex is making a phone call to get Carter fired. He is demanding to know where Kara is. Lex tells him she was just arrested by the department of domestic security and has been taken to a lab in Virginia. Kara is restrained on a table in a lab, in deep pain from the kryptonite surrounding her. She keeps insisting she's human, but Carter wonders how she smashed into an impenetrable vault.
Prior to capturing her, he spoke with the lab tech she tried to seduce. Using technology developed at Summerholt, Carter is able to force people to relive their memories by injecting the meteor rock straight into their veins. He gives Kara a small dose of kryptonite, wanting know more about her background.
After experiencing a memory, Kara awakens , still in Carter's lab. He discovers she was on Earth in 1986, before the first meteor shower. Kara continues to deny being an alien, but her pain is getting worse. Carter injects more kryptonite into her veins to force another flashback. In the lab, Clark bends the door open and is immediately weakened by the kryptonite radiation filling the room.
Carter realizes that he is from the same race as Kara. Clark warns him that the meteor rock exposure is killing her and punches him away. Clark is able to remove the IV from Kara's arm, but he sees the same flashback Kara is seeing when he tries to disconnect the rest of the equipment.
Clark discovers that Kara has flat-lined from the kryptonite exposure. He tries to wake her up while Carter is sneaking up behind him with more kryptonite. Lionel Luthor appears in the doorway and shoots Carter dead.