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 Suleka Mathew as Reporter Kwesi Ameyaw as Liner Captain Erin Karpluk as Woman #1 Michael Eklund as Prosna Barclay Hope as Transport Pilot Moneca Delain as Blonde Woman Fred Keating as Jr. Reporter B.J. Harrison as Woman #3 Jenn Griffin as Woman #2 Brenda McDonald as Old Woman Nadine Wright as Chantara Tim Henry as Doctor Zahf Paroo as Man #1 Nigel Vonas as Pilot #3 Michael Soltis as Chantara's Husband 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