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