[yefragetuwrabrumuy]

Worthy of mention is Star Trek The Animated Series (1973–1974). While the animation was marginal, they used serious plot lines that can be argued are good enough to be considered canon.

[GreenLanternCorps]

“Yesteryear”, ‘nuff said.

[Bloody Sam Roberts]

While the animation was marginal, they used serious plot lines that can be argued are good enough to be considered canon.

And they were before the animated series. Several plot lines and alien species were taken from Larry Niven's "Tales of Known Space".