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