I don't know, i'll have to watch it. You're saying that from Juniors perspective you can see a shaft of sunlight but from Columbos you can't? If that's the case, good catch! Can't wait to watch it tonight.

Steve - I'm offering the absence of sunlight as proof the doors are shut, to me it almost appears as though the scences viewed from Columbo's perspective were shot in a studio, though I doubt that was the case.

You can clearly see that the sunlight is different
in the two different shots, but in my opinion, BOTH
were filmed in a studio.