Timothy Watson

as Ernest 'Willie' Hornung

as Clerk of Assize

as RMP Captain

as Michel Mangeot

as Bailiff of the Court

as Count Bellair

as Astropath

as Fred Trent

as Narrator

as Vincent Treaborne

as Bob Hansen

as Prosecution Barrister

as Lt Nick Wolstoneholme

as Tristan

as Julian