 There were four renditions of the theme song. Initially,  B.J. Thomas (qv) sang it solo. Later, a track recorded by  Dusty Springfield (qv) was overlaid to create a duet.  Springfields track was replaced by Jennifer Warnes (qv) version  following her successful duet with Bill Medley (qv) on the  _Dirty Dancing (1987)_ (qv) soundtrack. The final season featured an  a cappella version.