The Adventures of William Tell is a British swashbuckler adventure series, first broadcast on the ITV network in 1958, and produced by ITC Entertainment.

American professor John Holden arrives in London for a conference on parapsychology only to discover that the colleague he was supposed to meet was killed in a freak accident the day before. It turns out that the deceased had been investigating a cult lead by Dr. Julian Karswell. Though a skeptic, Holden is suspicious of the devil-worshiping Karswell. Following a trail of mysterious manuscripts, Holden enters a world that makes him question his faith in science.

Scotland Yard detectives attempt to solve a spate of safe robberies across England beginning with clues found at the latest burglary in London. The film is notable for using a police procedural style made popular by Ealing in their 1950 film The Blue Lamp. It is known in the US as The Third Key.

Spurred on by the death of his drug-addicted sister at the hands of ruthless narcotics kingpin Frank McNally, U.S. drug enforcement agent Charles Sturgis embarks on an investigation that takes him from New York to London, Lisbon, Rome, Naples and finally Athens in pursuit of McNally's shapely associate, Gina Broger.

Eight people at a remote Scottish inn find themselves confronted by a woman from Mars, who has landed her flying saucer for repairs but intends to soon conquer the Earth and enslave its men for breeding purposes.

A Liverpool juvenile liaison officer struggles with a young and dangerous pyromaniac.

A detective tracking a stolen gem begins to suspect there's more to the case than just theft.

Two small boys are playing in a wood. The younger boy has a revolver and, not understanding that the gun differs from his toy pistol, plays 'highwayman' on the road and holds up a cyclist; the gun goes off, killing the cyclist. Both boys are unaware of the tragic consequences of their game. The body and the gun are found by Bob Carter, who had recently quarreled with the victim in the presence of their workmates, and both men had uttered threats. The evidence is strong, and Bob is arrested for murder...

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!

Peter and his friends find unexpected and exciting adventures when all their wishes are granted by a magic marble.

The exciting adventures of five children who set out to vindicate a school friend wrongly accused of theft from the local museum.