It looks like the laserdiscs 7.5IRE 'setup' got left in the encode. I can take it out pretty accurately, the only issue might be that any 'blacker than black' in the image will get crushed to absolute black.

I can also mask the video noise at the top, which I suspect is the closed caption line.

Does anyone have any experience pulling closed captions from AVIs ? I've tried CC extractor, etc, and haven't got anywhere. It would be nice to have the subtitles as a SRT track.

Will probably take a crack at the rest of Season 4 shortly.