Original: The first six seasons of the show were all based in Los Angeles and nearby locations -- both real and fictional -- in California , although occasionally other locations have been featured as well -- most notably , Washington , D.C. , where a portion of the episodes took place during the fourth and sixth seasons .
Simplified: The first six seasons of the show were all based in Los Angeles and nearby locations -- both real and fictional -- in California , although sometimes other locations have been used as well .