Guest Stars Jane Wymark as Joyce Barnaby Barry Jackson as Dr. George Bullard Karl Johnson as Derek Lockwood Annette Crosbie as Amelia Plummer James Fleet as Ralph Plummer Lizzy McInnerny as Caroline Plummer Geraldine Alexander as Helen Plummer Jasper Britton as Anselm Plummer Steve Speirs as Keith Carter Pauline Whitaker as Jackie Carter Ann Beach as Sonia Hardwick Tom Bowles as Milner Vivienne Ritchie as Dr. Sarah Stannard Lucy-Ann Holmes as Factory Worker John Quayle as Mr. Judd Benedict Sandiford as Alex Hardwick Rod Hallett as Dexter Lockwood David Ross as Sam Hardwick