Tom Baker

The Doctor

Elisabeth Sladen

Sarah Jane Smith

Ian Marter

Harry Sullivan

Wendy Williams

Vira

Kenton Moore

Noah

Richardson Morgan

Rogin

John Gregg

Lycett

Christopher Masters

Libri

Stuart Fell

The Wirrn

Nick Hobbs

The Wirrn

Gladys Spencer

High Minister (voice)

Peter Tuddenham

Voices on Nerva (voice)