 Actor Adam LaVorgna (qv) who played the character Robbie Palmer  for four seasons left the show abruptly after the first few episodes  in the seventh season. His last appearance was in the episode "Peer  Pressure". His character did have lines in the next episode "Lost  Souls", but they were later replaced by the Roxanne Richardson  (Rachel Blanchard (qv)) character saying the lines. No explanation  was ever given for his departure other than the fact that both sides  agreed the parting was "mutual" according to Spelling TV executives.