A series of mysterious murders, committed by the poison of a black Mamba, puts London in distress. Scotland Yard's Superintendent Elford suspects that the "Squeaker" is behind the murders - the mysterious stranger, the underworld is afraid of and is unsuccessfully hunted by Scotland Yard. The clever mugger grabs his share of each robbery's loot, in return for not reporting the burglars to the police. Superintendent Elford's investigations lead him to a well-known animal wholesale business, where a Mamba was stolen. The former shopkeeper was blackmailed by the "Squeaker" and subsequently forced to death. His widow, the charming old Mrs. Mulford, now looks after dismissed convicts and has handed over the business to the obscure Frank SutSound. The suspicion focuses more and more on the sly animal keeper Krishna. But one morning he also disappears...

A serial killer named The Shark is terrorizing London by killing his victims with a speargun and then, dressed in a scruba-diver's wetsuit, using the city's sewer tunnels to make his getaway. Inspector Wade of Scotland Yard is assigned to the case, and he begins to suspect that the Shark is tied in with a smuggling ring the authorities believe is run out of a dive on the Thames waterfront called The Mekka.

两伙芝加哥黑帮在伦敦对富人们进行敲诈勒索，一时间人心惶惶，一个老富翁是这伙劫匪的目标，在他被残忍地杀害后，名声不好的侄子以为自己能得到他所有的财产，然而最后却是富翁的女助手继承了他的遗产。为了解除黑帮的威胁，苏格兰场找来了美国联邦调查局精干的警官（克里斯多夫·李饰演）帮忙，同样加入这场警匪之斗的还有一个古怪的管家（艾迪·阿伦特饰演）。劫匪撕票事件愈演愈烈，两名警官决心将他们绳之以法。（豆瓣电影字幕翻译2.0小组）

The "Frog with the Mask" spreads fear and anxiety within the streets of London. The creature is hidden under a wide clergyman's robe, its face covered up and only two enormously frightening, gleaming eyes can be seen. Together with members of his gang the "Frog with the Mask" hunts down innocent victims. Scotland Yard's Superintendent Elk is full of activity, as there are absolutely no traces on the crime scenes - only the wrists of the murdered bear a visible trace: the black "Frog Gang" mark. But - Then there is also Private Detective Richard Gordon together with his butler who are trailing down the "Frog with the Mask" as well...

威尔逊船长死后留下了一座城堡--黑林城堡。船长的22岁的女儿简.威尔逊前来城堡料理后事，其父的家庭律师罗伯特.杰克逊说船长生前商定愿以10,000英镑出售城堡，然而简.威尔逊对此表示拒绝，不承认委托书。 奇怪的是，来访的客人居然还对附近的一个老酒馆客栈感兴趣。更令人恐惧的是在城堡附近的旷野和沼泽里不断有来访着莫名其妙地被一只带牙套的黑狗咬死。而且简.威尔逊小姐的床上也被人放上了一条毒蛇！ 管理城堡地下室的是克里姆斯比，一个独眼龙。他养着一些毒蛇。他在毒蛇的牙齿中提取致命的毒液并放在牙套里安插在一条黑狗的尖牙上... 这一切到底是怎么回事呢？ 随着威尔逊的前妻-也就是城堡的最后继承着凯瑟琳抵达城堡后一切开始明朗化了。 一番调查后，约翰爵士发现，城堡中出现的费尔班克斯，纳尔逊和被咬死的塔克等人都曾是威尔逊船长所管辖的“PRESENT MONRO”号轮船上的工作人员 关于这艘船上，曾有珍贵的珠宝突然消失的“传说”。 那么，这些人是不是和这些珠宝有关呢？如果是这样，那珠宝在哪里呢？剧中威尔逊船长怎么会复活的呢？

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

Disaster lies over Castle Darkwood. While the castle owner is still fighting his imminent death, the family is already fighting over his heir. Shortly before his death, he changes his will to the benefit of his daughter, who should continue the girls school in the Castle, and his granddaughter Gwendolin, who shall inherit the entire fortune. Both sons go out empty. Thereupon ill-fated things happen: the girls disappear, a shrouded monk shape spooks through the dark park, people are found strangled to death by a whip: This is a case for Scotland Yard's finest! Inspector Bratt comes to solve the mysterious happenings...

A businessman organises a caper to steal the Crown Jewels from the Tower of London.

Karin Dor ("The Green Archer") and Siegfried Lowitz ("Der Frosch mit der Maske") return for the 7th entry of the Edgar Wallace series, while Hellmut Lange stars for the first time as Peter Clifton who marries the beautiful Jane (Karin Dor). Jane discovers a printing machine for banknotes in her new home. Has she just married "The Forger of London", or who else could be responsible for the counterfeits? Funny enough, Peter doesn't know that himself because he seems to be a victim of schizophrenia... which Jane once dryly describes to him thus: "Can you imagine how interesting it is to have a husband who never knows where he wakes up?" Typical music by Martin Böttcher, unusual story, powerfully directed by Harald Reinl - a good movie, even if none of the most popular in the series. Apparently the producers tried to break fresh ground here instead of repeating a formula, and this courage is one reason why the Edgar Wallace series lasted so long.

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

黑袍院长的鬼魂一直在老修道院里游荡，有人声称亲眼看见过它。切尔福德家族的第十八代伯爵哈里•切尔福德与莱斯丽•盖恩订了婚，莱斯丽的哥哥亚瑟身为律师同时也是个赌徒，则掌管着切尔福德家族的财产。伯爵曾向他的秘书玛丽•温娜求过婚，但是他的异母兄弟迪克阻止了这门婚事。一次复仇行动正在酝酿……玛丽计划同亚瑟联合起来，她的筹码则是传说中的切尔福德宝藏—两点五吨的黄金。（豆瓣电影字幕2.0小组）

A serial-killer is murdering the ladies of a night club. Detective Gray is seeking for the killer but can only find a lot of gangsters. And the killer is about to act again...

A strange, red circle appears on the neck of a man saved from the guillotine. What is its mysterious meaning? Tragically, it turns out to be something of a family curse, as each generation thereafter bears the same sign, which in turn leads to blackmail and murder.