Guest Stars Irina Brook as Helen Jenny Agutter as Grizel Elspet Gray as Dorothy McFadyean Gavan O'Herlihy as James MacQuarrie John Fortune as Rhoddy Baillie Michael Gough as Hector David Langton as Ronald McFadyean Jonathan Burn as Merrison Robert Ellis as Campbell Allan Sharpe as Dr. McKenzie Emil Fortune as Donal MacQuarrie
