Earl Jenkins, aka The Jitterbug, was a character from the WB TV series Smallville, appearing in the Season One episode "Jitters" as the freak of the week main antagonist.
He was portrayed by Tony Todd who famously portrayed the titular character in the Candyman horror franchise, Captain Darrow in The Rock, Grange in The Crow, Shadow in Shadow: Dead Riot, Zoom in the Arrowverse, Dreadwing in Transformers: Prime, The Fallen in Transformers: Revenge of the Fallen, Luther Thompson in the third season of Scream and voiced Zoom in The Flash TV series.
Earl Jenkins once worked as a farmhand on the Kent family farm twelve hours a day for six seasons until he took a job at the LuthorCorp Fertilizer Plant Number Three as a janitor. During his time at the plant, he was assigned to clean Level 3, a secret area of the plant where LuthorCorp conducted agricultural experiments using meteor rocks to speed up crop growth. The fertilizer was applied to the crops as a green mist.
During this time, an explosion occurred and Earl was later transferred to LuthorCorp Headquarters in Metropolis. Following Earl's transfer, LuthorCorp shut down the third level of the fertilizer plant. He was exposed to an unknown chemical following an accident that left him with a dangerous affliction that sent him into violent seizures.
Earl's body would spasm so fast that he destabilized the structural bonds of whatever he touched, making him dangerous to other people and was fired from LuthorCorp as a result. Because of this condition, his wife left him but the condition persisted and threatened his own life.
Earl went to visit his infant son in Metropolis but was unable to hold due to his tremors and left the apartment before his Belinda could catch him. Earl then went to the LuthorCorp Plaza building during a rain storm. He tried to take his prescription pills but was trembling so badly that he drops the bottle and the pills spilled into the street ruined in the pouring rain.
He ran to the building and called his friend Will, the maintenance man, to let him in to see Lionel Luthor. Will tells him to leave and Earl violently seizures causing the glass in the lobby to shatter. Will ran up and helped him to his feet, wanting to take Earl to the doctor, but Earl gets another case of the jitters while he's still got a hold of Will. Having had his arms around him, Earl accidentally broke Will's neck, killing him. Horrified, he ran off into the night.
Earl then went to the Kent Farm hoping to speak to Jonathan but he and Martha were out of town while Clark threw a wild party at his house. Clark and Whitney found Earl in the barn. Just then Earl begins to seize but when Clark reaches out to him, but it's like reaching out to meteor rocks. They then took him to the hospital.
At the hospital, Deputy Miller arrives in Earl's room where he is causing a ruckus. Earl is standing but shaking so badly that anyone who approaches is thrown across the room, even Clark. When the fit ends, Earl collapses to the floor.
Clark returned home and told his parents about Earl who was at the hospital and wanted for murder. Clark also told them that he couldn’t get close to him because it made him sick the same way meteor fragments do. Jonathan and Clark went to the hospital to check on Earl. The doctor explains that he is suffering from some kind of mineral poisoning. Tiny bits of the mineral have implanted under his skin. His body is trying to push them out.
He claims it all started after an explosion at the LuthorCorp plant six months ago, but there is no record of any explosion. When Jonathan enters Earl's room, Earl explains the explosion that occurred. When he was caught in the shockwave, LuthorCorp shut down the whole level and transferred Earl to Metropolis.