A hard-nosed Chicago cop is sent to London to bring back an American mobster being held for extradition. Brannigan in his Irish-American way brings American law to the people of Scotland Yard but has to contend with a stuffy old London first.

A young woman looking into the disappearance of her fiance discovers that the last place he was seen was at a very strange motel.

A doctor and his wife are held hostage in their country home by an escaped convict and his sidekick, but a journalist's arrival complicates matters.

The Doctor, Jamie and Zoe return to Earth and become embroiled in the schemes of Tobias Vaughn. They meet up with an old friend, Colonel (now Brigadier) Lethbridge-Stewart, and some old enemies, the Cybermen.

Professors Vooshka and Crump decide to visit an archaeological site to study the artifacts there. Lo and behold, it's right next to a caravan site where all manner of people are staying. With a randy Major owning the site, a snobbish mother, and the two professors' constant innuendos, the story ends with a sinking caravan site and a striptease performance as a replacement for the cabaret night.

The population of the United Kingdom at the beginning of the 21st Century is static, thanks to computerised population control, but the wife of the Population Officer becomes pregnant for the second time.