Jean Grey is Unable to Sleep.
The voice actors on the first season of X-Men: The Animated Series were under a great deal of pressure. Even if Catherine Disher didn’t get enough sleep, she would record her lines as Jean Grey on the set of the series. At the same time as X-production, Men’s, a vampire series was being shot, which necessitated a lot of overnight filming to complete.
The problem was that X-Men was recorded on Friday mornings, so she would work all night and then show up for work the next day without having slept at all the night before. We had no idea how much effort went into bringing your favorite X-Men characters to life on Saturday morning cartoons until we saw them for ourselves.