Stewart Granger

David Porter

Lex Barker

Glenn Cassidy

Pierre Brice

Agent Brice

Karin Dor

Denise (Rio segment)

Walter Giller

Karl (Vienna segment)

Johanna Matz

Monique Carrar (Vienna segment)

Klaus Kinski

Gomez (Rio segment)

Richard Münch

Professor Alden (Frame story)