David Tennant

as The Doctor (voice)

Freema Agyeman

as Martha Jones (voice)

Anthony Stewart Head

as Baltazar (voice)

Toby Longworth

as Caw / Squawk (voice)

Liza Tarbuck

as Captain Kaliko (voice)

Tom Farrelly

as Swabb (voice)

Lizzie Hopley

as Mantasphid Queen (voice)

Paul Clayton

as Mergrass (voice)

Steven Meo

as Pilot Kelvin (voice)

Barney Harwood

as Control Voice (voice)

Stephen Greif

as Gurney (voice)

Dan Morgan

as Locke / Warders (voice)