When Harriet Zapper is hired to find the identity of Karel Duval, and the true heir to the Duval family fortune, a bloody trail of murders leads the Big Zapper from London to the South of France and into a hornet's nest of betrayal and death.
Linda Marlowe
as Harriet Zapper
Alan Lake
as Reynaud Duval
Jason Kemp
as Karel Duval
Tony Theng
as Hock
Edina Ronay
as Guy Champion
Noel Johnson
as Christian Duval
Peter Halliday
as Rabelais
David Robb
as Alex Zendor
William Ridoutt
as Inspector Cook
Graham Ashley
as Barfly
Michael O'Malley
as Gendarme
