David Tennant (Tenth Doctor)
Freema Agyeman (Martha Jones)
Anthony Head ? Baltazar
Toby Longworth ? Caw / Squawk
Liza Tarbuck ? Captain Kaliko
Tom Farrelly ? Swabb
Lizzie Hopley ? The Mantasphid Queen
Paul Clayton ? Mergrass
Steven Meo ? Pilot Kelvin
Barney Harwood ? Control Voice
Stephen Greif ? Gurney
Dan Morgan ? Locke / Warders