Tom Baker

The Doctor

Matthew Waterhouse

Adric

Sarah Sutton

Nyssa

Janet Fielding

Tegan Jovanka

Anthony Ainley

The Master

Delore Whiteman

Aunt Vanessa

Tom Georgeson

Detective Inspector

John Fraser

The Monitor

Christopher Hurst

Security Guard

Adrian Gibbs

The Watcher (uncredited)

Peter Davison

The Doctor

Peter Pratt

The Master (archive footage)

Bruce Purchase

The Captain (archive footage)

Michael Wisher

Davros (archive footage)

Valentine Dyall

The Black Guardian (archive footage)

Peter Grimwade