In Kansas City, Mo., a suspect in a stolen vehicle abandons the car and takes off into the woods; and a man is taken into custody after being accused of threatening a resident with a gun. Also: A driver with alcohol in his car hits a pedestrian.

After a falling-out with Rutherford, the guys are recruited by Roxie's rival event planner - and former assistant - Emily Corgy (guest star Erinn Hayes) to play an "End of the World" party. The guys don't feel good about the career move after learning Tommy and Emily have started dating. Worlds collide when they learn the event they're scheduled to play has been double-booked with another "End of the World" party thrown by Rutherford. Even worse, it's headlined by Mother of the Bride's rival - the Def Leppard tribute band Armageddon It (fronted by guest star Ken Marino). It's a recipe for disaster.

Jennifer Lawrence hosts. Music guest: The Lumineers

It's 1958 and Nurse Jenny Lee discovers the Nonnatus House community gathered to wish her a happy birthday as she returns from work. Chummy, Trixie and Cynthia then go to the cinema with her. Her good cheer is soon short lived though the next day when she is assigned a new patient called Molly Brignall. Trixie and Sister Evangelina end up in the middle of some unusual circumstances, aboard a Swedish cargo ship when they look after the captain's daughter, who is about to give birth for the first time.

The brutal clearing of a local slum for the underground railway reveals an almost indecipherable murder scene and an unreliable slum girl witness. Lucy Eames, beautiful and disturbed, is the unlikely key to a Byzantine web of conspiracy.

Harry decides to set up a beauty counter near the front entrance to sell perfume and make-up, to give the store a boost - but some of the staff are not convinced this is such a good idea. Meanwhile, Victor is still trying to woo Agnes, who appears to be more interested in Henri, and Lady Mae reveals the truth to Rose about Mr Selfridge's partnership with Ellen Love.