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 Abram Rooney as Dr. Clifford Gibbs Katherine Kingsley as Mona Davies Geff Francis as Grantly Smalls Chris Fulton as Dr. Broderick Castle Daniel Attwell as Mick Mitcham Tristan Sturrock as Dr. Bernard Gould James Laurenson as Professor George Amory Robert Luckay as Professor Yuri Gradenko Ruby Thomas as Tessa Knight Dawn Hope as Adelaide Smalls Natalie Grady as Ruth Hargreaves
