| Mislin, Marcus | Marcus Mislin | Actor, Director | 1987 - 2013 | 7 | 1 |
| Martin, Gundula | Gundula Martin | Costume Designer, Designer | 1987 - 2014 | 3 | |
| Maschek, Siegfried | Siegfried Maschek | Actor | 1987 - 2016 | 4 | 1 |
| McGuinness, Frank | Frank McGuinness | Adaptation, Producer, Translator | 1987 - 2019 | 139 | |
| Moliński, Rudolf | Rudolf Moliński | Actor | 1988 | 1 | |
| Marquez, Sandra | Sandra Marquez | Actor | 1988 | 1 | |
| Mahaney, Richard A. | Richard A. Mahaney | Designer | 1988 | 1 | |
| Medioli, Joanna M. | Joanna M. Medioli | Costume Designer | 1988 | 1 | |
| Mumm, Bob C. | Bob C. Mumm | Lighting Designer | 1988 | 1 | |
| Møller, Anette, Holm | Anette Holm Møller | Costume Designer | 1988 | 1 | |
| Mackenzie, Peter | Peter Mackenzie | Actor | 1988 | 1 | |
| Marchegiani, Fiorenza | Fiorenza Marchegiani | Actor | 1988 | 2 | |
| Manzon, Carla | Carla Manzon | Actor | 1988 | 2 | |
| Maasilta, Markku | Markku Maasilta | Actor | 1988 | 1 | |
| Marinozzi, Paola | Paola Marinozzi | Actor | 1988 | 1 | |
| Manker, Katharina | Katharina Manker | Actor | 1988 | 6 | |
| Markovics, Karl | Karl Markovics | Actor | 1988 | 5 | |
| Müllner, Wolfgang | Wolfgang Müllner | Actor | 1988 | 5 | |
| Myerscough-Jones, David | David Myerscough-Jones | Designer | 1988 | 1 | |
| Mortlock, Joyce | Joyce Mortlock | Costume Designer | 1988 | 1 | |
| Marchael, Pamela | Pamela Marchael | Actor | 1988 | 1 | |
| Montgomery, Joy | Joy Montgomery | Actor | 1988 | 1 | |
| Medwin, Michael | Michael Medwin | Actor | 1988 | 1 | |
| Messel, Hanne | Hanne Messel | Actor | 1988 | 1 | |
| Moore, Dermod | Dermod Moore | Actor | 1988 | 7 | |
| Mason, Patrick | Patrick Mason | Director | 1988 | 1 | |
| McCallum, David | David McCallum | Actor | 1988 | 1 | |
| Marlay, Andrew B. | Andrew B. Marlay | Costume Designer | 1988 | 1 | |
| Mead, Simon | Simon Mead | Actor | 1988 | 2 | |
| Mannion, Tom | Tom Mannion | Actor | 1988 | 2 | |
| Miller, Harry | Harry Miller | Actor | 1988 | 2 | |
| McElhatton, Michael | Michael McElhatton | Actor | 1988 | 2 | |
| Morse, Helen | Helen Morse | Actor | 1988 | 1 | |
| Miller, Marga K. | Marga K. Miller | Actor | 1988 | 1 | |
| Mejzlík, Miroslav | Miroslav Mejzlík | Actor | 1988 | 1 | |
| Mullins, Carol | Carol Mullins | Lighting Designer | 1988 | 1 | |
| Mocanu, Florentina | Florentina Mocanu | Actor | 1988 | 1 | |
| Mărăscu, Tudor | Tudor Mărăscu | Director | 1988 | 1 | |
| Merino, Mayte | Mayte Merino | Actor | 1988 | 1 | |
| Marczis, Demeter | Demeter Marczis | Actor | 1988 | 1 | |
| Montenegro, Ira | Ira Montenegro | Lighting Designer | 1988 - 1989 | 4 | |
| Myara, Charles | Charles Myara | Actor | 1988 - 1989 | 9 | |
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