Crane was a scientist working in West Berlin.
She was primarily funded by Leith's division of the military. Leith asked her to meet Lara Zannis who had a blueprints based on her experiments. When the War Doctor took her back in time with the Shadow Vortex and Zannis, she theorised that he was using the Pauli Exclusion Effect to destroy the device. (AUDIO: The Shadow Vortex)