The photodissociation spectroscopy and dynamics of the CH3S and CD3S radicals have been investigated using fast radical beam photofragment spectroscopy of the (A) over tilde (2)A(1) <--(X) over tilde E-2 electronic band (T(0)congruent to 26 400 cm(-1)) and an unstructured band near 45 600 cm(-1). At all energies, only one major channel, CH3((X) over tilde (2)A(2)") + S(P-3(j)), was observed. Photofragment yield spectra for the (A) over tilde (2)A(1) <-- (X) over tilde E-2 electronic band show resolved vibrational progressions extending well beyond those seen in laser-induced fluorescence studies of this band. Photofragment translational energy distributions yield the S(P-3(j)) fine-structure distribution for each vibrational level of the CH3 product. Photofragment angular distributions were found to be highly anisotropic (beta= - 0.2 to - 1.0+/-0.1) with increasing anisotropy at higher photon energies. The results yield a refined heat of formation for CH3S (1.346+/-0.018 eV) as well as the mechanism by which the (A) over tilde (2)A(1) State is predissociated. Results at 45 600 cm(-1) imply that dissociation occurs on the repulsive (B) over tilde (2)A(2) state.