Geeson appeared in several stage productions in the 1980s, including two for the Royal Shakespeare Company, as well as an Off-Broadway production of "The Common Pursuit" (1986). After relocating to the United States she returned to television, playing the recurring character of Maggie Conway in the American series "Mad About You" from 1992 until 1999, as well as a recurring role on "Gilmore Girls" in 2002. In 2012 and 2016, she appeared in Rob Zombie's "The Lords of Salem" and "31", respectively.