Terrence E. McNally is an American actor from Massachusetts.

He has appeared in such films and television shows as Star Trek: The Next Generation, Dallas, Nine to Five, Taking Care of Business, Looker, Earth Girls Are Easy (for which he also contributed to the script and as producer), Battle Beyond the Stars.

He was married to actress Julie Brown.

Ex-brother-in-law of Paul Brown (II).

Trained at the American Conservatory Theatre, at Harvard University, and with Roy London, Charles Conrad, Donna Gerard, Milton Katselas, The Actors Institute, and Phil Foster.