A friend and neighbour of Lavinia Smith, in the village of Moreton Harwood. When Sarah Jane Smith came to visit at Christmas 1981, Lavinia had gone off to the States for a lecture tour earlier than planned. Juno and her husband did not have contact details for her, and tried to reassure her that nothing was wrong. When strange things started to happen at her aunt's home, Sarah suspected that Juno might be involved. It transpired that she was quite innocent of any involvement in the pagan cult presided over by Major Pollock and Lily Gregson.
Played by: Linda Polan. Appearances: K9 & Company - A Girl's Best Friend.
- Polan appeared again with Lis Sladen the following year - in the Barry Letts directed Gulliver in Lilliput.