History of character is unknown.
- Temporal Mechanics: Jeff Smith is an expert in the field of temporal mechanics, quantum theory and the relationship between energy and matter as it pertains to the Space/Time continuum.
- The Post-Crisis version of Jeff Smith is African American as opposed to Caucasian like his Earth-One counterpart.
- Owns a white cat.
- 9 Appearances of Jeffrey Smith (New Earth)
- 3 Images featuring Jeffrey Smith (New Earth)
- 1 Quotations by or about Jeffrey Smith (New Earth)
- Character Gallery: Jeffrey Smith (New Earth)