Aunt Heidi (Heidi Popkiss) is the sister of Professor Popkiss, who co-designed and built Supercar (with his friend and colleague, Dr. Horatio Beaker).
She is the legal guardian of Zizi, a young French girl; and, like her brother Rudolph, she enjoys cooking!
She appears in the second-series episodes Precious Cargo and The Day That Time Stood Still.
She was voiced by Sylvia Anderson.
Tea with Mike
The Day That Time Stood Still
The Day That Time Stood Still