In addition and pre Dynasty, Michael Nader was in an NBC soap opera called Bare Essence, set in the perfume\cosmetics industry.
There is a Dynasty connection - Bare Essence began life as a miniseries on CBS, with Linda Evans in the role of Genie Francis's mother. Also in the cast of the miniseries was Bruce Boxleitner.
Although the miniseries got great ratings, CBS passed on turning it into a weekly serial. (Think All The Way in Australia -which was a flop as soon as made weekly).
NBC however decided to commission Bare Essence as a weekly serial. With Linda Evans doing Dynasty, Jennifer O'Neill, who later appeared in Glen Larson's Cover Up, which like My Sister Sam is only well known nowadays because of the behind the scenes tragedies (the voice of Tommy Pickles from Rugrats sang the theme to Cover Up, a Bonnie Tyler cover), took over Evans's role.
With Boxleitner probably busy too, Al Corley, the original Steven in Dynasty, took over his role after the NBC switch.
It only lasted 11 episodes before ending.
NBC did bizarrely schedule it - it aired after The A-Team on Tuesday night, as NBC hoped Peppard and the gang would have viewers sticking around to watch BE. Unfortunately it lost most of the A-Team lead-in.
In the end, they replaced it with the Pierce Brosnan series Remington Steele (which had undergone a retooling too for S2, with James Read leaving of his own accord and Janet DeMay fired and the replacement of both with Doris Roberts) and BE went up where RS had been, on Fridays at 10pm against Falcon Crest. And BE was never going to survive there.