Guest Stars Tahmoh Penikett as Karl "Helo" Agathon Alessandro Juliani as Felix Gaeta Nicki Clyne as Callandra "Cally" Henderson Paul Campbell as Billy Keikeya Callum Keith Rennie as Leoben Conoy Alonso Oyarzun as Specialist Socinus Ty Olsson as Captain Aaron Kelly Lorena Gale as Elosha Biski Gugushe as Sekou Hamilton Ryan Robbins as Charlie Connor Matthew Bennett as Aaron Doral John Mann as Linden Connor Widdows as Boxey Erin Karpluk as Woman #1 B.J. Harrison as Woman #3 Michael Eklund as Prosna Suleka Mathew as Reporter Barclay Hope as Transport Pilot Fred Keating as Jr. Reporter Moneca Delain as Blonde Woman Zahf Paroo as Man #1 Tim Henry as Doctor Kwesi Ameyaw as Liner Captain Nigel Vonas as Pilot #3 Michael Soltis as Chantara's Husband Brenda McDonald as Old Woman Nadine Wright as Chantara Jenn Griffin as Woman #2 Nahanni Arntzen as Pilot #2 Lymari Nadal as Giana Haili Page Philippe as Cami Ron Blecker as Launch Officer Denzal Sinclaire as Man #3 Ryan Nelson as Pilot #4 Robert Lewis as Man #2