|Planet of Origin:||Earth|
|Original era:||20th Century|
|First Appearance:||The Gloom of Aquanus|
|Last Appearance:||The Marathon Pursuit|
|Portrayed By:||Joan Plowright|
Irma enthusiastically joined the Inspector's travels along with her colleague, the English teacher Bart Gilbert, and had numerous adventures together. Eventually she married Bart, and they decided to leave the Inspector and explore Earth's 25th-century galactic empire when they came into possession of a Blorgon time/space machine at the end of the serial "The Marathon Pursuit".