Just discovered Don Murray's son appeared on one of the early episodes of knots. Was wondering which other relatives appeared and which roles ? These are the ones I can think of: 1. Joan van ark's daughter vannesa - young Val 2. William devane's son Josh - young Greg 3. Michele Lee's son David - sumner group employee (also a student?) 4. Constance mccashine - Daniel and meg ? John pleshette had family ties with David Jacobs through his wife. Anyone else ?