In the title mol-ecule, C29H22ClN3S, the quinoline ring system, thio-phene ring and phenyl ring substituents are inclined at angles of 71.70 (7), 59.26 (9) and 81.61 (9)°, respectively, to the 4,5-dihydro-pyrazole ring. In the 4-phenyl-quinoline ring system, the phenyl ring makes a dihedral angle of 62.49 (7)° with mean plane of quinoline ring system. In the crystal structure, mol-ecules are linked via weak inter-molecular C- H⋯N hydrogen bonds, forming an extended one-dimensional chain along the b axis and are further consolidated by C- H⋯π and π-π stacking inter-actions [centroid-centroid distances = 3.7022 (10) Å].