Bertha is a British stop motion-animated children's television series about a factory machine of that name, comprising 13 episodes that aired from 1985 to 1986. Other major characters in the series were Mr Willmake (factory owner), Mr Sprott (Bertha's chief designer) and Tracy (Mr Sprott's young assistant). All the characters were designed by Ivor Wood, and the series was produced by his company, Woodland Animations. It was broadcast on BBC Television.