BTW, I was looking at the Bewitched episodes ... I have a relatively recent DVD set (Mill Creek 2015
) - all very good quality, but 4:3, with seasons 1 and 2 in B&W. Looking and comparing to what's on CTV, Seasons 3 to 8 have been rescanned in HD and are presented as 16:9. The colours look very good! The loss of picture at the top and bottom is a bit annoying - oddly compared to the 4:3 version, they seem to have picked up some screen on the right, and lost a bit on the left. All very watchable though, and probably slightly preferable to the SD 4:3 scans.
But for Seasons 1 and 2, they've use the old colourized versions, resulting in 4:3 versions with relatively poor picture quality - I'm guessing that the original colourization many years (decades?) ago was done on relatively poor-quality copies ... and to keep seasons 1 and 2 in colour, it's not economic to go back to the rescanned black and white prints (negatives?).
I've been watching with my daughter, who moaned about the first two seasons being in B&W - but now I've seen how poor the colourized versions on CTV look, even she admits she's glad we watched in B&W.
I haven't looked at I Dream of Jeannie as closely - but the quality of the colourized versions (of Season 1) looked a lot better than Bewitched - though still clearly colourized, with the depth of skin tones never looking right. The entire series seems to be 4:3 ... decent pictures, but I think they are all SD scans.
Now if only I could find Gilligan's Island somewhere - I'm hesitant to accumulate too many more DVDs in this streaming age. (trying to find something both the kids will watch, that I can stomach too, is always a challenge ...)