| N and O | Character – Actor |
| Edward Nash – Edward Rhodes | Old Nathaniel – Anthony Collin |
| Larry Naylor – John Downing | Terry Neame – Richard Benbow |
| Mrs Naylor – Anthea Holloway | Horace Nelson – Graham Ashley |
| Rusty Naylor – Robin Browne | Arthur Neville – William Joblin |
| Mr Nicholson – Robert Stafford | Linda Nolan – Marjie Lawrence (rundown and killed Arthur Brownlow) |
| Rupert Norden – Alan Judd | Len Norris – Michael Harley |
| Mrs Oakley – Dorothy Edwards | Beth O’Brien – Margo Cooper |
| Father O’Connor – Nicholas Grimshaw | Donald O’Brien – Simon Barclay |
| Kathleen O’Donovan – Leanne O’Neill | George Ogilvy – Joe Ritchie |
| Tim O’Hara – Thom Delaney | Mrs Ogilvy – Vivienne Burgess |
| Rex Oliver – Kim Fortune | Mr Ollenshaw – Aubrey Davers-Walker |
| Mr O’Neill – Benny Lee | Maureen O’Rourke – Kate Brown |
| Mr Osimoto – Kristopher Kum | Greg Owen – Michael Ridgeway |
 |
 |