Ηθοποιοί επεισοδίου
Jon PertweeThe Doctor
Nicholas CourtneyThe Brigadier
Caroline JohnLiz Shaw
Ronald AllenRalph Cornish
★
Robert CawdronTaltalian
Michael WisherJohn Wakefield
★
Cheryl MolineauxMiss Rutherford
★
Ray ArmstrongGrey
★
Robert RobertsonCollinson
★
Dallas CavellQuinlan
★
Ric FelgateVan Lyden (voice)
★
Bernard MartinControl Room Assistant
John MorenoDobson
★
James HaswellCorporal Champion