Lately I have been watching the original Perry Mason series on MeTV, which is aired on Monday thru Friday at 11:30 pm HST and at 9:00 am HST. I do know that the morning airing is from a different season than the late night airing.

Some episodes I remember when it was re-run on KGMB late night in the middle 1970's, but other episodes I haven't seen before.