
Dr. John Finnegan saves lives for a living on The Bold and the Beautiful, and while we know that Finn is more of a Boy Scout than a killer, he still has this one very toxic trait that could end his marriage to Steffy.
Poor Finn (Tanner Novlan). Not only is his birth mother, Sheila (Kimberlin Brown), a serial killer, but so is his newly-discovered daughter, Luna (Lisa Yamada). Now Steffy (Jacqueline MacInnes Wood) is terrified that the killer gene might have been passed to their son Hayes.