Pearl Forrester is a character on the Mystery Science Theater 3000 television series, played by Mary Jo Pehl. Forrester was the mother of Dr. Clayton Forrester (Trace Beaulieu). Initially devised as a guest character, Pearl would take on an increasingly important role in the series, first as a replacement supporting character for Dr Forrester and subsequently replacing him as the lead mad scientist.Pearl's first appearance was in episode 607, Bloodlust!.