With impressive credits to Harrington's name, audiences best know of Delphi Harrington from Harrington's roles in dramatic television series. Harrington worked on a variety of projects during Harrington's early entertainment career, including "All My Children" (ABC, 1969-2011), "Guiding Light" (CBS, 1951-2009) and "Ryan's Hope" (ABC, 1974-1989). Harrington also contributed to "Where the Heart Is" (CBS, 1969-1973). Harrington also appeared in the TV special "My Palikari" (PBS, 1981-82). Harrington's work around this time also included a part on the TV movie "A Good Sport" (CBS, 1983-84). During these years, Harrington additionally appeared in film, receiving a role in "Cookie" (1989) with Peter Falk. Harrington also worked in television around this time, including a part on "Law & Order" (NBC, 1990-2010). Additionally, Harrington appeared on the television special "The Secret Life of Mary-Margaret: Portrait of a Bulimic" (HBO, 1992-93). Harrington held additional roles in television including a part on "Swans Crossing" (1991-92). Most recently, Harrington acted on "Law & Order: Special Victims Unit" (NBC, 1999-).