The Millers in Wonderland - Elisabeth Sladen as the Dormouse, telling the treacle-well story in BBC’s Alice in Wonderland (1986).
A little over a decade after this:
With a big thanks to @still-she-haunts-me-phantomwise for sharing this adaptation. Lis appeared in episodes 3 and 4, as did her husband Brian Miller, who played the Gryphon. [episode 3 | episode 4 | all episodes]