We don't have a biography for Mark Harrison yet. Hang in there, or go ahead and contribute one.
Appearances
One Day at a Time
Guest cast, played by David Spielberg
- Episode 4x14: The Married Man (1) (Jan 17, 1979)
- Episode 4x15: The Married Man (2) (Jan 17, 1979)
- Episode 4x16: The Married Man (3) (Jan 24, 1979)