Angela Bruce (Brigadier Winifred Bambera)
Alex Jordan (Sergeant Jean-Paul Savarin)
Yemisi Oyinloye (Dr Louise Rix )
Ian Abeysekera (Colonel Birch)
Timothy Blore (UNIT Trooper / Talbot / Zeta Hydran)
Chandrika Chevli (Clare Yale / President Esperanza)
Nathaniel Curtis (Dom McNeil / Zeta Hydan 1)
Lesley Ewen (The Omniarch / Landau)
Jason Forbes (Baghead / Zeta Hydran 2)
Sarah Griffin (Captain Carmen McClean / Nurse Bannister)
David Menkin (Colonel Alexander Hagen / Delegate)
Liz Sutherland-Lim (Dame Lydia Kingsley / Joyce)