| I and J | Character – Actor |
| Horace Jackman – Ken Wynne | Mrs Jackson – Jacqueline Morgan |
| Nurse Jackson – Elizabeth Gordon | Mr Jacobson – Anthony Viccars |
| Cameron James – Lee Davis | Linda James – Elizabeth Adare |
| Lorna James – Carole Allen | Winston James – Trevor Butler |
| Tara James – Tara Shaw | Iris Jamieson – Aidan Turner |
| Dick Jarvis – Brian Kent | Alice Jenkins – Damares Hayman |
| Kitty Jarvis – Beryl Johnstone (Dick’s Wife) | Arnold Jenkins – David Aucker |
| Brian Jarvis – David Fennell (Dick/Kitty’s son) | Gordon Jenkins – Alan Hay |
| Enoch Jarvis – Jack Hayes (Dick’s father) | Mr Jenks – John Sherratt |
| Mr Jessel – Edmund Pegge | Frank Jessop – Ellis Dale |
| Staff Nurse Johns – Gaye Rourke | Alan Johnson – Michael Osbourne |
| Mrs Johnson – Mary Jones | Mr Johnstone – Francis De Wolff |
| Heather Jones – Patsy Trench | Miss Jones – Jill Stanford |
| Pearl Judd – Monica Lewis | Mr Jones – Blake Butler |
| Mr Jones – John Wade | Mrs Jones – Elizabeth Gordon |
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