American adventurer Harry Steele (Heston) earns a living as a tourist guide in Cusco, Peru but plans to make his fortune by finding the Sunburst, an Inca treasure. He possesses an ancient carved stone which gives the location of the Sunburst but has no means to travel there. He is also menaced by his dubious associate Ed Morgan (Mitchell) who wants the treasure for himself and tries to have Harry killed.
Two criminals are stalking the streets of London one dark night. Frank Clemmons (Dirk Bogarde), a cocky young man, holds psychiatrist Dr. Clive Esmond (Alexander Knox) up at gunpoint, but Dr. Esmond manages to overpower him. Frank has two options; he can go to prison or he can be a guest at Dr. Esmond’s house where he’ll be a human guinea pig subjected to Dr. Esmond’s scrutiny, which aims to cure him of his criminality. Frank agrees upon the latter. Arriving home from a holiday in Paris, Dr. Esmond’s wife Glenda (Alexis Smith) is taken aback when she sees the new household guest. Glenda has her reservations about Frank and behaves in a cold, aloof manner towards him.
A spacecraft is viewed flying over the British countryside by several eye witnesses, including a woman who gets into an auto accident as a result. Later, a man enters a country inn very near where the sighting and auto accident took place. Acting strangely, seemingly able to read people's thoughts, he gives no name but says he needs a room. The stranger (Helmut Dantine) also asserts that he is responsible for saving the life of Susan North (Patricia Neal), the road accident victim. When he explains that he comes from the planet Venus, Arthur Walker (Derek Bond), a high-ranking government official and Susan's fiancé, calls the War Ministry. A Dr. Meinard (Cyril Luckham) later examines the stranger from Venus and observes that he seems to have no pulse.
Une voiture heurte un objet invisible; le sang se répand à partir d'une source invisible qui devient visible lorsque l'homme qui saigne, meurt. Il porte avec lui une note de suicide dédiée à son seul ami, qui est aussi un homme invisible. Un jeune reporter passionné traque Takemitsu Nanjo, un vétéran de la guerre qui gagne visiblement sa vie en se peignant le visage comme celui d'un clown et en portant des pancartes publicitaires. Son voisin préféré est une petite fille aveugle dont la mère se heurte à des gangsters locaux. Les gangsters terrorisent la ville en tant que "gang invisible", s'enveloppant dans des écharpes et des trench-coats afin d'être visibles pour leurs victimes, même s'ils sont censés être invisibles en dessous. Une fois qu'ils découvrent Nanjo, qui défend ses seuls amis, ils le battent et le laissent pour mort.
In 1953, renowned French scientist Professor Montel (Victor Francen) goes missing. The authorities believe that he and four other scientists defected behind the Iron Curtain.
Un détective privé est chargé de retrouver une employée disparue avec un important lot de bijoux. Son employeur vient de perdre son épouse qui s'est suicidée, mais l'enquête met en doute les circonstances du décès.
Young reporter and amateur biker Jerry Marsh investigates sightings of a hooded black figure on a motorbike. It turns out a gang of smugglers use a haunted castle as their base, deterring curious locals by pretending to be ghosts.
Wealthy hypochondriac bachelor Murray Selwyn (Guy Middleton) has been ordered by his doctors to avoid stress, but unfortunately finds himself face to face with a gang of counterfeiters. Murray has unwittingly come into possession of the printing plates the gang is after. His stress levels escalate further when Murray's nurse (Joan Winmill Brown) is kidnapped by the gang.
San Francisco ex-cop Vic Barron's (Stevens) family died and he himself was disfigured, framed and imprisoned when he crossed the wrong mobsters. After his release, Vic has but one desire, revenge on gangster Tino Morelli (Douglas Kennedy), whom he considers responsible.
James Nevill, a nearly bankrupt businessman, hires his best friend to kill him so his wife can collect on his life insurance. After his business takes a sudden upswing he changes his mind, but he must get to the killer and tell him so before the killer gets to him first. Nevill suffers several near misses before learning that it is partner and another who really want to kill him, not his friend whom they have kidnapped and framed. In the end, the villains shoot each other.