On what network did an American actress portray Shirley Partridge, along with David Cassidy, beginning in 1970?
The Partridge Family:  It ran from September 25, 1970, until March 23, 1974, on the ABC network as part of a Friday-night lineup, and had subsequent runs in syndication. Shirley Jones:  She played the lead role of Shirley Partridge, the widowed mother of five children, in the musical situation-comedy television series "The Partridge Family" (1970–74), which co-starred her real-life stepson David Cassidy, son of Jack Cassidy.
ABC