A circus barker stages a sensational new act, the world's longest fast undertaken by “Sapolio”, on view in a glass cage. But this act also results in several murders, a kidnapping, and a poisoning!
John Ireland
Pel Pelham
Honor Blackman
Jenny Pelham
Geoffrey Keen
Harry Stanton
Eric Pohlmann
Henri Sapolio
Sidney James
Tony Lewis
Liam Redmond
Inspector Lindley
Tonia Bern
Rena Maroni
Sydney Tafler
Rorke
