  In this paper we study the fermion quasi-normal modes of a 4-dimensional
rotating black-hole using the WKB(J) (to third and sixth order) and the AIM
semi-analytic methods in the massless Dirac fermion sector. These semi-analytic
approximations are computed in a pedagogical manner with comparisons made to
the numerical values of the quasi-normal mode frequencies presented in the
literature. It was found that The WKB(J) method and AIM show good agreement
with direct numerical solutions for low values of the overtone number $n$ and
angular quantum number l.
