| Mrs Bellwether |
Music teacher at Coal Hill. |
| Captain Brent |
Army officer. Father of John Brent. |
| John "the Martian" Brent |
Schoolfriend of Susan. Son of Captain Brent. |
| Basil James Carker (M.A., Oxon) |
Headmaster at Coal Hill. Next seen in Remembrance of the Daleks.. |
| Ian Chesterton |
Science teacher at Coal Hill. Next seen in An Unearthly Child. |
| Wendy Coburn |
Year Four girl at Coal Hill. |
| The Cold |
Ancient entity composed of, or living in, ice. |
| Leslie Culver |
Year Five boy at Coal Hill. Considered an R.E. Swot. |
| Dolly |
Waitress at the Wimpy Bar. |
| Joe Gibson |
Year Five boy at Coal Hill. |
| Mr Grange (Ghastly Grange) |
Susan's form master. Geography teacher at Coal Hill. |
| Mr Henry Haigh |
Local Vicar near Coal Hill. |
| Mrs Haigh |
Wife of Mr Haigh. |
| Dudley Hatcher (Dirty Gertie) |
Year Five boy at Coal Hill. |
| Sadie Lederer |
Year One girl at Coal Hill. |
| Malcolm |
Afro-carribean 6 year old who Susan looks after outside school. |
| Francis Minto (F.M.) |
School bully at Coal Hill. |
| Mooney |
Private in the army. |
| Ape Oakhurst |
Games teacher at Coal Hill. |
| Mademoisele Quelou ('Madam Weasel') |
French teacher at Coal Hill. |
| Gillian Roberts |
Susan's schoolfriend. |
| Barbara Wright |
History teacher at Coal Hill. Next seen in An Unearthly Child. |
| Zack |
Biker. Member of the Ton-Up club. |
