Constance Clarke

Constance Clarke was a companion of the Sixth Doctor. She was a WREN during World War II. (AUDIO: The End of the Line)

Personality
Constance was apparently married. When the Doctor introduced her to others as "Constance," she was quick to correct the Doctor to a more formal "Mrs. Clarke." (AUDIO: The End of the Line)

Behind the scenes

 * Constance premiered in The End of the Line as an existing companion to the Sixth Doctor. Due to the release date of The Sixth Doctor: The Last Adventure being changed from September 2015 to August 2015, The End of the Line was released before the character's introductory story.