From Wikipedia (English):

Peter C. MacNicol (born April 10, 1954) is an American actor. He is known in films for his roles of Janosz Poha in Ghostbusters II, Stingo in Sophie's Choice, and David Langley in Bean. For television he is known for the roles of the eccentric lawyer John Cage in the FOX comedy-drama Ally McBeal, as Tom Lennox in the sixth season of action-thriller 24, Alan Birch in the medical drama Chicago Hope, and as physicist Dr. Larry Fleinhardt on the CBS crime drama NUMB3RS.

Early life

MacNicol was born and raised in Dallas, Texas, the youngest of five children of Barbara Jean (née Gottlich), a homemaker, and John Wilbur Johnson, a corporate executive who became an Episcopal priest later in life. MacNicol began his career studying at the University of Dallas and University of Minnesota. While in Minnesota, he performed in two seasons at the Guthrie Theater. A New York talent agent spotted him and told him to make a move to Manhattan.