Lionel Bartsow is an assassin employed by high-end clients such as CEOs and heads of state, with a "death touch" that allows him to kill anyone with whose bare skin he comes into physical contact. After being captured by the authorities, his attorney, Neil Lewis (the father of Olivia Lewis, aka Slingshot
), advised him to testify against his former employers. His employers then kidnap Neil Lewis, blackmailing Slingshot into freeing Barstow. After Dynamo 5
, who are not acquainted with Barstow's powers or his relationship to Neil's kidnappers, free Barstow, he kills his ex-employers, and reveals the truth to his rescuers. Although Livvie's siblings are outraged at learning that they freed a murderer, Livvie is more concerned with getting her father to safety than returning Barstow to the authorities, a decision that serves as a source of tension among the team. Livvie later finds Barstow and returns him to the authorities, despite his threat to use her secret identity as a bargaining chip with them.