Conner Kent, formerly known as Alexander Luthor and LX-15, is a Human/Kryptonian hybrid clone in the CW TV series Smallville. A former recurring antagonist before becoming an ally, he appeared throughout the Tenth and final season.
He was portrayed by Jakob Davies, Connor Stanhope and Lucas Grabeel.
When Clark Kent fell ill after inhaling meteor rock spores, Dr. Helen Bryce drew blood from him for testing. Lex Luthor broke into her lab and stole the blood sample for his own experiments. Although he gave it back to Helen, he secretly kept a sample to create the clone and stopped the accelerated aging in the other clones.
When Tess Mercer awoke in Cadmus Labs, she explored the facility and met a young clone named of Alexander. She saw the other clones and asked who they were with Alexander responding they were his "brothers". When he wasn't looking, Tess accidentally released LX-13, an unstable clone due to Lex's memories and the accelerated aging. Tess told Alexander to run before LX-13 pinned her down and ignited Cadmus Labs, destroying the lab and killing most of Lex's other clones. After being rescued by Clark Kent, Tess brought Alexander to the Luthor Mansion where he played with some old toys while she brought him a glass of milk. Unknown to her, Alexander put one of the toys into the fireplace.
At the Daily Planet, Tess was discussing the state of Alexander with a therapist who stated his intelligence was off the charts. He requested Alexander be moved to a facility where he could be monitored at all times because of his instability as he was aging abnormally fast. Tess said that she will have him ready, then stared lovingly at his picture, but was interrupted by Cat Grant. Tess later reconsidered and decided that what Alexander needed was love. After speaking and getting advice from Cat, Tess returned home and read Peter Pan to Alexander who told Tess he loved her.
At the Luthor Mansion, Tess threw a birthday party for Alexander. Unlike the original Lex Luthor, Alexander's party was packed with guests, all of whom sing "Happy Birthday" to the delighted boy. Alexander proceeds to hug Tess and thanks her for the party, right before Tess is called away. Alexander was enjoying the party but then started drawing on a paper plate the House of El emblem. With that stroke of memory, Alexander had a seizure which Tess and the therapist ran to his aid.