Jessica Copeau

 was a scientist on Planet Z02-80535. She thought that the technical faults the team experienced were caused by a malfunction.

She showed the malfunctions and their specimens to the Third Doctor and Sarah Jane Smith when they arrived. She was appalled when the Doctor informed the team that the slug-like natives were sentient.

Copeau and the rest of the team were killed when the Builders attacked them. (PROSE: Primitives)