||Leonid Sepanov is one of 780 characters who have appeared in fewer than six episodes. Not much information may be available about him or her.
Leonid Sepanov was a 19th-century Russian atheist philosopher. He first appeared in Olivia's mind in episode #925: “Triple-Decker Sundae”. In it, he was a voice in Olivia's mind who caused her to doubt her faith in God.
Leonid Sepanov is voiced by Unknown, has appeared in 3 episodes, and has received an average user rating of 93%.