| Production | Played by | Opening Night |
|---|---|---|
| Seadna 1969 (Abbey) | Ó Briain, Micheál | Friday, 26 December 1969 |
| Seadna 1979 (Peacock) | Ó Briain, Micheál | Friday, 28 December 1979 |
| Production | Played by | Opening Night |
|---|---|---|
| Seadna 1969 (Abbey) | Ó Briain, Micheál | Friday, 26 December 1969 |
| Seadna 1979 (Peacock) | Ó Briain, Micheál | Friday, 28 December 1979 |