Television shows rarely jump networks, but it does occasionally happen. Sometimes when a show gets canceled by one network, another one will decide to pick it up to see if it will fill a need they have.
ABC has often picked up shows from other networks and in these cases, it picked up shows from NBC.
Diff'rent Strokes ran for one season on ABC after a seven season run on NBC.
Father Dowling Mysteries ran for two seasons on ABC after just one season on NBC.
Matlock ran for six seasons on NBC and three on ABC.
Most recently, Scrubs ran for seven seasons on NBC and two seasons on ABC.
