Former stage actor Basil Karlo, Clayface uses a variety of props
and appliqués in his pursuit of crime
| Issue | Comment | Reprinted in |
| Detective #40 | 1st Appearance, vs. Batman & Robin | Batman Archives #1, Batman Chronicles #2, Golden Age Batman Omnibus Vol. 1 HC |
| Detective #49 | vs. Batman and Robin | The Batman Archives #1 |