Tyler McKnight was a metahuman criminal with the ability to control glass in the WB TV series Smallville. He served as the main antagonist of the Season Five episode "Fragile".
He was portrayed by Callum Keith Rennie, who also played Asher Talos in Blade: Trinity, John Wakefield in Harper's Island, Karl Malus in Marvel's Jessica Jones, Jon Valor in DC's Legends of Tomorrow and Brad Halloran in Jigsaw.
Tyler McKnight was a craftsman who worked with glass making art. He was caught in the 1989 meteor shower that hit Smallville and gained the ability to telekinetically control glass due to his work ethic. He had a college girlfriend, Teri Van Horn, became pregnant, which resulted in the birth of their daughter Maddie in 1995.
Teri kept her from him because of his criminal background. Tyler knew Maddie had inherited his powers and as a result he killed Teri to get to her. Tyler had also used his ability to break into a jewelry store, which he was caught for an sent to Belle Reve. He was later released due to good behavior.
When Tyler was released in 2006, he went looking for Maddie and killed her current foster mother, Naomi, but failed to retrieve her. He soon got another chance and grabbed Maddie at the Kent Farm, after causing the car windows to explode, killing a Child Services advocate and injured Lois Lane impaling her shoulder with shards of glass, knocking her to the ground.
McKnight approached the car, pushes Maddie back in, and drove away. Maddie tried to use a pay phone to call Clark when Tyler approached. He tells her that he is her father, Tyler McKnight. Maddie figures out that Tyler has the same power as she does and is the one responsible for the recent deaths, including her mother's. Tyler says that he's spent years in prison and wants her with him.
He planned to run away with her, but first stopped at the Talon and collects seven diamonds he had hidden in the glass. Tyler was stopped by Clark who super sped into the room throwing Tyler across the room, and Maddie runs into his arms. Tyler was taken into custody. However, Tyler managed to escape police custody by killing an officer by destroying the lenses of his glasses and subsequently returned to the Kent Farm to "recover" Maddie.
That evening, Maddie and Clark are playing cards when he notices the front door is busted. He finds Tyler McKnight in the barn with a shard of glass held to Martha's throat, threatening to kill her unless Maddie leaves with him. Clark uses his heat vision on the glass and Martha runs to safety. Tyler then sends a cloud of broken glass towards Clark, but it is redirected by Maddie, expertly controlling the glass and saying that she won't let him hurt anyone else.
Clark talks her out of killing Tyler, reminding her of a past conversation they'd had about Clark's relationship with his biological father. Maddie lets the glass fall and Tyler, seeming to realize what he almost made his daughter do, is subdued. Tyler was subsequently placed back in Belle Reve.