JOSEPHINE GRANT: Having an uncle in a high government position, Jo Managed to arrange herself a job in U.N.I.T. The Brigadier in charge of the organization in Britain was none too pleased at the thought of having a college girl loose in a top security establishment. However, the Brigadier did have a sense of humour and was never one to miss an opportunity and decided to make the most of the situation by playing a small practical joke on his scientific advisor, the Doctor. Unfortunately for the Brigadier his little prank of making Jo the Doctor's official assistant backfired to some extent. For after a shaky start, Jo and the Doctor became great friends.
Out of all his companions Jo, a small cheeky blonde girl whose scatty antics were forever causing vexation, was probably the Doctor's favourite. She and the Doctor were inseperable come what may until the day she travelled to Wales and met a certain Professor Clifford Jones whom she later married. As a wedding present the Doctor gave them a blue Metebelis III crystal.