| Name | Character | Episodes |
|---|---|---|
| Arthur Lowe | Louis Pasteur | 3 |
| Charles Kay | Roux | 2 |
| James Grout | Robert Koch | 2 |
| Antonia Pemberton | Marie Pasteur | 2 |
| John Normington | Grancher | 1 |
| Milo O’Shea | Paul Erlich | 1 |
| Michael Gough | Sir Almroth Wright | 1 |
| Clifford Rose | Herxheimer | 1 |
| Name | Character | Episodes |
|---|---|---|
| Arthur Lowe | Louis Pasteur | 3 |
| Charles Kay | Roux | 2 |
| James Grout | Robert Koch | 2 |
| Antonia Pemberton | Marie Pasteur | 2 |
| John Normington | Grancher | 1 |
| Milo O’Shea | Paul Erlich | 1 |
| Michael Gough | Sir Almroth Wright | 1 |
| Clifford Rose | Herxheimer | 1 |