| Peter Davison |
Eric Brown (Series 1-2) |
| Karl Howman |
Philip Sims (Series 3-10) |
| James Grout |
Mr. Beeston (Series 1-11 & 14) |
| Tom Watson |
Mr. Holliday (Series 1-10) |
| Margaret John |
Mrs. Stone (Series 1-8 & 14) |
| Vivienne Martin |
Mrs. Rudd (Series 1-10 & 14) |
| Paul Copley |
Mr. Long |
| Marlene Sidaway |
Miss Lewis |
| Deirdre Costello |
Mrs. Patterson (Series 1-10 & 14) |
| Carolyn Pickles |
Mrs. Devon (Series 11-13) |
| Michael Cochrane |
Mr. Maxwell (Series 11-14) |
| Jacqueline Beatty |
Miss Reid (Series 9-14) |
| Teresa Gallagher |
Miss Featherstone (Series 11-14) |
| Janice Acquah |
Mrs. Khan (Series 11-14) |
| Brigit Forsyth |
Mrs. Eastwood (Series 14) |