I realy do not remember if they had scene together. May be they did at the time Clark was Bou Rivage (do not know how it is spelt lol) and the Queen Mary story. Donna was model then. Do you know Carrie is a Cheff i read it somewhere. She works at some restaurant and may be travles a lot. Dan lives in Italy as Clayton Norcross does too.
In it's first week on air 'How to Survive a Marriage' averaged a 20 share in the 3.30 timeslot. That was one share under what Return to Peyton Place had been doing.
I guess NBC hoped for better but were probably realistic that a new show would take time to build. However HTSAM never seemed to gain momentum and was cancelled.
I do know that another blacklisted actor, Joseph Jullian, took roles on The Edge of Night, As the World Turns, and Dark Shadows.
He wrote a book about his being blacklisted. I cannot remember the name of it, but, when I do, I will post,