Series Lost to Oblivion

What are some of the best series that aren't legally available to rewatch today for various reasons?

Wuzzles is one because of rights issues between Disney and Hasbro.

SCTV will have clips sometimes surface on YouTube, but there is no way to watch entire seasons, to my knowledge.

Ed mostly seems lost due to music rights issues.

WWF Superstars of Wrestling from 1986 to about 1990 is mostly lost due to legal entanglements surrounding the name, so WWE doesn't show it on Netflix or YouTube.

What are some others?

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