(written from a Production point of view)
Dan Tirman is an actor who appeared as Ensign O'Halloran in the Star Trek: Voyager fifth season episode "In the Flesh". As a background actor he received no credit for this appearance but was identified by the call sheets of the episode.
Tirman was also featured in the short comedy Castro's Day in Los Angeles (2001). In 2011, he worked as associate producer and starred as Dan in the comedy series Gregory Way TV. Tirman also wrote two episodes for this series.