In "The Legacy of Time", a special six-part audio to celebrate Big Finish's twentieth anniversary of producing "Doctor Who"-related audios, the story "The Sacrifice of Jo Grant" sees Jo Grant and Kate Stewart of the present day being sent back to the 1970s by a series of temporal rifts, where they meet the Third Doctor as he investigates the anomalies in his time. While Kate attempts to avoid introducing herself to limit the risk of a paradox, the Doctor realizes her identity and convinces her to call her father, introducing herself as the commander of UNIT in the future without identifying herself by name, with the Brigadier (voiced by Jon Culshaw once again) telling her that he is assured that the future of UNIT is in good hands.