 CONT: Columbo enters the murder house through the front door in a  pouring rainstorm. His trousers are wet, and hes wearing a hat and  using an umbrella. While he is inside, we hear thunder. Then,  Columbo steps out the back door, and into bright sunshine. Perhaps  it could be argued that the abrupt change is consistent with Los  Angeles weather patterns, but this would not explain how there is no  rainwater anywhere on the deck, on the garbage cans, or in the sand.