Barry O'Neil was a film director and writer. His real name was Thomas J. McCarthy. He directed several Thanhouser films including the production company's first two-reeler, Romeo and Juliet. He went on to work for Lubin and then World Film Corporation.

When the Earth Trembled (1913) is an American silent disaster film starring Ethel Clayton and Harry Myers. The film, a short feature, may be the first fiction film to depict the 1906 San Francisco earthquake.