Johnny "J.J." Bannerman, Jr. was the son of Sarah Bracknell and Johnny Smith, though he was raised from infancy by Walter Bannerman, and the older brother of Hope Smith. His nickname of "J.J." is short for "Johnny Jr.," though he is a "junior" only in the sense that he inherited his given name from his biological father, while he grew up with the surname of his step-father. Additionally, in the episode Big Top, it is implied he has the same ability as Johnny.