Competitors face a challenging obstacle course in hope of landing a spot in the finals.

Portland, Ore., police chase a suspect who runs from a traffic stop and also pursue a naked bicycle rider; officers respond to a call concerning a man being chased by a knife-wielding suspect.

As election day nears, Birgitte comes clean to her party about her recent performance. Meanwhile, unable to make their mark with the opposition's policies, the New Democrats try to highlight the differences between their party and the Moderates. But when Jacob Kruse steals a key policy, a mole is suspected within the party.

Jeremy and Richard attempt to solve the problems complex cars pose to an ageing population by creating a vehicle for elderly people and putting it to the test in Dorset. James finds out more about with the latest Range Rover in London before pitting the luxurious off-roader against an autonomous military machine in Nevada. James McAvoy is this week's star in a Reasonably Priced Car.

Crowded living conditions mean that tuberculosis has been rife in Poplar. A mass-Xray programme to diagnose the disease early though is introduced and Dr Turner is determined that the community will no longer live under the threat of the disease. The nuns and nurses attempt to support the doctor in his campaign to bring proper screening facilities to the area and Jenny's district nursing rounds lead her to a family who have suffered devastating misfortune from the disease.

Reid is adrift, his team in pieces and Leman Street shaken to its foundations following recent events. A kidnapping offers him cause to assemble his men and tackle the white slavery ring operating in their midst. But Reid is gripped by a growing obsession that this leads back to the terrible secret from his own past.

Harry and Rose are getting ready to host a dinner in honour of friends Frank and Jennie Woolworth. Frank is a fellow American retail tycoon and founder of the famous High Street chain. A Woolworth's store is about to open in Brixton, and when Frank thinks of a possible West End branch, Harry's feathers soon become ruffled. Lady Mae wants to introduce young Rosalie to some eligible young Society men. Kitty and Doris vie for the vacant position of Senior Assistant in Accessories and are interviewed by Mr Grove. Ellen Love makes a surprise visit to the Palm Court, with Tony Travers on her arm. Victor has a proposition for Lady Mae.

Crumb has discovered his bloody way in the world with a new friend in tow. After Rook approaches Hal to get them under control, Hal can't refuse as he owes Rook a favour.