This guest-starred the look-alike son of the ultimately tragic Robert Walker, Sr. - who was married to Jennifer Jones at one time: this is one of their two sons.
The mysterious Evan is a guest at Audra's fancy birthday bash and drama ensues.
The episode is memorable for having another African-American servant (a young woman) helping Silas at the birthday party and for the little orchestra playing "The Big Valley" theme.
Walker is suitably creepy as the irresponsible and morally corrupt Evan and Stanwyck is great as always.
The wig Evan's mother wears is ridiculous and their house looks like a 1965 ranch-style one (i.e.: a little too contemporary - but oh, well -
P.S. = Listen for the perennial "Emperor's Waltz" being played in the background! - that's Hollywood)