Producers tried to conceal Pamela Bellwood's real-life pregnancy in season 6 as it was not written into the script, but it was sometimes apparent on-screen that she was pregnant. Pamela also missed five episodes in mid season 6 when she had her baby.
Heather Locklear was a regular in season two, and left to join another Aaron Spelling program, T.J. Hooker (1982), but continued to make appearances on "Dynasty". She rejoined the series as a regular in season six.