 From there, Gallagher moved to Los Angeles to pursue acting in film and television; after making a screen debut in "George Washington", she graduated to recurring roles in "Hill Street Blues" and "China Beach", and starring roles in "The Slap Maxwell Story," "The Larry Sanders Show" and "Millennium".The role of Catherine Black in that series had been written with Gallagher in mind.Gallagher was born in Reading, Pennsylvania on February 6, 1960, to Aileen and Donald Gallagher.