Step by Step is an American television sitcom that starred Patrick Duffy and Suzanne Somers as two single parents, who spontaneously get married after meeting one another during a vacation, resulting in them becoming the heads of a large blended family. The series aired for seven seasons, originally running on ABC as part of their TGIF lineup on Friday nights from September 20, 1991 to August 15, 1997, and was canceled by the network after six seasons, reportedly due to declining ratings. The series was picked up on CBS and aired on that network from September 19, 1997 to June 26, 1998 for its seventh and final season.