Ηθοποιοί επεισοδίου
Peter DavisonDr Stephen Daker
Graham CrowdenDr Jock McCannon
Barbara FlynnDr Rose Marie
David TroughtonDr Bob Buzzard
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Elaine TurrellNun
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Sonia HartNun
Joanna KanskaGrete Grotowska
Michael ShannonVice-Chancellor Jack Daniels
Lindy WhitefordMaureen Cahagan
Gillian RaineMrs Kramer
Colin StintonCharlie Dusenberry
Kay StonhamDaphne Buzzard
James GroutProfessor George Bunn
Thomas WheatleyProfessor Farris