Scotland Yard investigates a series of murders where the victims have died by snake venom poisoning.

A rich man bequeaths seven keys to seven of his friends, but only one will unlock the door to untold wealth.

The sister of a famous, but as yet uncaught, criminal named "The Hexer" is murdered. Inspector Higgins of Scotland Yard believes that "The Hexer" will surface to take his revenge on his sister's killers, and plans to set a trap to finally capture him. However, soon bodies start piling up, and it looks as if "The Hexer" may get away yet again.

Now Brunhild knows by which treason she was won for king Gunther of Burgund by Siegfried of Xanthen, and has been revenged by his foul murder by Hagen, more bloody revenge is inevitable. Hagen steals the Nibelungen-treasure to sink it in the stream and manages to kill Alberich and seize his invisibility-cap. Queen Kriemhild is packed of to an abbey so her son may grow up to become a prelate, but Hagen's men raid them and kill the child. She now accepts to become the wife of Etzel, king of the truly barbaric Hun nomads and invites the Burgund court nomenclature at their Danube court for their heir's baptism a few years later, but prepared a bloody conspiracy with her xenophobic brother-in-law behind her surprisingly chivalric husband's back, while Gunther accepts, hoping to avoid a far bloodier war, despite the danger for his party of knights, which materializes...

Siegfried of Xanten snatches the Nibelung treasure from the king of the underworld and slays the dragon Fafnir, whose blood makes him invulnerable. Siegfried falls in love with Kriemhild, the sister of the Burgundian king. But only if Siegfried helps Gunther marry Brunhild will he be allowed to marry Kriemhild. He fulfills this condition, but the two women bring ruin upon Xanten and Burgundy...

A hooded serial killer finds a novel way to murder his victims--he lashes them to death with a whip. The police try to track him down before any more murders occur.

Fred Engel's father is murdered by Colonel Brinkley in order to acquire a treasure map, however the Colonel only acquires half of it, the other half as held by Mrs. Butler. Discovering the scene of the crime, Old Shatterhand and Winnetou help Fred bring his father's murderer to justice and locate the treasure of Silver Lake.

The construction of the Great Western Railroad creates heavy conflict between the railway company and neighboring Indian tribes. Worse, criminal gang leader Santer sets his eyes on a gold mine located on holy Indian land and influences the construction supervisor to re-rout the planned railroad straight through Apache land. Old Shatterhand, who works as a measurement technician, discovers the evil plan and searches contact with the Apaches in an effort to avert war.

Police try to track down a hooded serial killer who murders his victims with a combination of acid and poison gas.