Guest Stars Caroline O'Neill as Win Thursday Abigail Thaw as Dorothea Frazil Sara Vickers as Joan Thursday Adam James as Kent Finn Gillian Saker as Dr. Pat Amory Geff Francis as Grantly Smalls Katherine Kingsley as Mona Davies Abram Rooney as Dr. Clifford Gibbs Chris Fulton as Dr. Broderick Castle Tristan Sturrock as Dr. Bernard Gould James Laurenson as Professor George Amory Dawn Hope as Adelaide Smalls Daniel Attwell as Mick Mitcham Robert Luckay as Professor Yuri Gradenko Ruby Thomas as Tessa Knight Natalie Grady as Ruth Hargreaves
