Tiberius Claudius (archive footage)

Charles Laughton

Acting

Interviewee [original author]

Robert Graves

Writing

Interviewee [director] / Himself (archive footage)

Josef von Sternberg

Directing

Interviewee / Messalina (archive footage)

Merle Oberon

Acting

Interviewee / Livia (archive footage)

Flora Robson

Acting

Interviewee / Caligula (archive footage)

Emlyn Williams

Acting

Interviewee [script girl]

Eileen Corbett

Acting

Interviewee [costume designer]

John Armstrong

Costume & Make-Up

Narrator

Dirk Bogarde

Acting

Himself – Ms. Robson's Host (uncredited)

John Abbott

Acting

Cassius, Captain of Caligula's guard (archive footage; uncredited)

Robert Newton

Acting

Xenophon, Claudius' doctor (archive footage; uncredited)

Basil Gill

Acting