After recovering her spaceship, she returned to her own plane of reality through the Gateway, and once safe within the Vortex she summoned her own people for help. (AUDIO: Harry Houdini's War)
The Sixth Doctor's companions from stage plays are difficult to assert with certainty, as different actors played the Doctor in the same play. If a medium is not mentioned, then this incarnation did not have companions who were original to that medium; it does not mean that this Doctor failed to appear in that medium.
