In the title compound, C(14)H(12)ClN(3)S, the dihedral angle between the terminal benzene rings is 56.6 (2)°; the benzene rings lie to the same side of the mol-ecule. The major twist in the mol-ecule occurs around the C(ar)-N bond (ar is aromatic) [C-N-C-C = 49.9 (5)°]. The configuration about the N=C bond [1.271 (4) Å] is E. The amine H atoms lie on opposite sides of the mol-ecule with one forming an intra-molecular N-H⋯N(imine) hydrogen bond and an S(5) ring. In the crystal, centrosymmetric dimers are formed via {⋯HNC=S}(2) synthons.