Ηθοποιοί επεισοδίου
Jon PertweeThe Doctor
Nicholas CourtneyThe Brigadier
Caroline JohnLiz Shaw
Norman JonesMajor Baker
★
Thomasine HeinerMiss Dawson
Paul DarrowCaptain Hawkins
Geoffrey PalmerMasters
★
Dave CarterOld Silurian
★
Nigel JohnYoung Silurian
★
Paul BartonSilurian
★
Simon CainSilurian
★
John ChurchillSilurian
★
Harry SwiftPrivate Robins
★
Pat GormanSilurian Scientist