I wonder if I'm in the minority because I actually liked Land of the Giants
better in it's second season - both the redone opening theme music; and the storyline changes where we found that the Giant's world (or at least the area where they landed) was a fascist state; and that they were interested in the 'little people' because of their higher technology, etc.
I also liked the first few episodes of The Time Tunnel
; and overall, I still think it's one season was better than ANYTHING Lost In Space
did in it's second and third seasons.
And I agree with the assesment that Voyage to the Bottom of the Sea
was more of a spy/adventure series, until it went into color peoduction, at which point the Seaview looked even more like a plactic toy in a fish tank; and they went to their 'monster of the week' format.