Matthew Modine (Dr. Michael Ranger (2 episodes, 2013))
Maxim Roy (Dr. Jane Whitlow (2 episodes, 2013))
Ted Whittall (Secretary Brian Lee (2 episodes, 2013))
Trevor Hayes (Jack Hillcroft (2 episodes, 2013))
Kate Drummond (Beverly Hillcroft (2 episodes, 2013))
Kalinka Petrie (Karen Ranger (2 episodes, 2013))
Spiro Malandrakis (Officer Tim Davis (2 episodes, 2013))
Alain Goulem (President Duncan (2 episodes, 2013))
Susan Hogan (Vice-President Alice Crane (2 episodes, 2013))
Francis X. McCarthy (William Danville (2 episodes, 2013))
Shan Chetty (Bunker Tech (2 episodes, 2013))
Dan Bingham (Peter Simpson (2 episodes, 2013))