A standard fixture of the Fantastic Comedy: whenever the series concept requires that an extraordinary person Masquerade as ordinary, there is one person around who suspects them, or has already learned about their secret (usually not every little detail, but enough to see them for what they really are). This character is always the Only Sane Man -- Clark Kenting, fortunately, still works for everyone else -- making this character only look crazy if they try to expose the protagonist. Contrast/compare Secret Keeper. See also Not-So-Imaginary Friend. Examples of Secret-Chaser include: