Harry is desperate to clear his name, Victor and Agnes endure some painful soul-searching when a loved one returns, and Miss Mardle grapples with a romantic dilemma.

Harry's judgement, Whiteley's and even Lady Mae's love life are now all under the spotlight of a tabloid frenzy. Jimmy's final act has Harry reeling and the retail mogul retreats from the publicity for the sanctuary of home. Mae, now at the end of her tether, contemplates her future in London. The threat of a trade embargo imposed by Hardcastle sees acting boss Gordon backed into a corner, and Harry called to account.

Following Henri's arrest and Harry's disappearance, everyone is in a state of confusion and the police arrive at the Selfridges' home in search of clues. However, when Rose discovers her husband is away on secret government business, she's more worried for his safety than ever before. Meanwhile, Agnes receives an ominous telegram, Lady Mae has to make a tough decision, and will Loxley get his comeuppance?

With German goods being taken off the store's shelves, Harry organises a patriotic concert to raise money for British troops, and Lady Mae arranges for an old friend to headline the event. However, Harry has also offered to help the government, and just as the gig is about to begin, he's ordered to leave London on a secret mission to Berlin. Elsewhere, Agnes and Victor find themselves going over old territory and an increasingly paranoid Thackeray takes action against Henri.

Lady Mae arranges an after hours shopping spree for King Edward VII. To thank Harry, the King invites the Selfridges to the opening of Ellen Love's new play, much to Rose's dismay. The Selfridges and Lady Mae discover the play is a satire aimed at ridiculing them, and scripted by an embittered Frank Edwards. Ashamed and humiliated, Rose takes the children back to America. Meanwhile, wedding bells will soon be ringing for two of Selfridges' own.

After recent ructions, Harry is more determined than ever to get Selfridges back on track and asks Delphine to organise a special event in the store.

With so many of the men signing up for duty, the women are now working in the loading bay and struggling to adjust, while Harry yearns to do more for the war effort, so Delphine introduces him to several senior government figures who could help. Crabb organises rifle training for the staff, Thackeray's anxieties about Henri reach a new level and Miss Mardle entertains a surprising house guest. Lord Loxley suddenly seems to be in the money, much to Lady Mae's concern.

Agnes is working through the night getting ready for the Empire Exhibition that Harry is rolling out across the store. Mr Crabb attempts to cover for Mr Grove after Harry thinks that he’s late for work again. Harry receives a visit from Henri and takes the opportunity to apologise and asks him to return to work. Gordon is fed up with the frostiness between his parents. Miss Mardle asks Grove to meet her at her new address and he finds out that she has inherited a beautiful London home and income from her brother. Lady Mae manages to find out that truth about Loxley’s finances and discovers that he has gambling debts and is rumoured to be all washed up.

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.

Harry deals with a raft of problems on his return from his secret government assignment - not least the news of Henri's arrest. Coming to his employee's aid, Mr Selfridge pulls a few strings and calls in a favour to get him out of custody. Meanwhile, the beleaguered staff receive a much-needed morale boost when Delphine arrives at the store accompanied by Hollywood producers and actresses, and Lady Mae decides it's high time she cut her ties with Loxley.

Rumblings of war and social unrest inspire trades union activists to target Selfridge's. Harry responds by throwing a tango party to thank the staff for their hard work. He also wants to do something more public and asks Agnes to organise a Celebration of Empire in the store - but is it too much for her? Meanwhile, Rose secretly seeks out an old friend for Harry, and trouble is brewing for Lady Mae.

Harry delights in a new car brought in for a window display, but after a confrontation with Rose, who has received a visit from his mistress Ellen Love, he hits rock bottom, drinking and reliving a traumatic childhood memory as he drives the vehicle into the night. Meanwhile, Agnes falls out with Victor when she returns to Selfridges, although Henri is pleased to see her again.

Harry offers his support when a situation sends ripples through the Selfridge’s staff and Mardle attempts to maintain composure but struggles with the weight of her secret.

After the huge success of the Selfridge Trust, Harry whisks a large group of journalists abroad to Biarritz for a typically decadent roaring twenties affair, which soon manages to get a little out of hand. Nevertheless, the retail magnate uses the occasion to announce that the Selfridge group has purchased a raft of new department stores across Britain. Meanwhile in London, the staff are preparing for a special visit by celebrated writer AA Milne, and Grove determines to continue with life as normal, until he gets a blast from the past.

While Harry decides to pursue a new charitable project, Crabb is faced with a massive professional dilemma. Agnes faces an unexpected challenge very close to home.

Harry and Nancy are enjoying the passion of their romance, having been together secretly for a while now. But as always, Harry has business to attend to.

Harry and Nancy bring the injured Kitty to hospital, whilst Frank rushes to be by her side.

Harry holds the biggest flash sale in the store's history, taking a massive gamble in the process. Nancy finds it difficult keeping her engagement from Gus.

Despite his loss, Harry pretends that it is business as usual and is happy to be distracted by new belle Rosie Dolly. Kitty is nervous to meet her role model, cosmetics icon Elizabeth Arden, who is opening an historic concession in the store. Following a fall, Grove contemplates retirement and buys the family's first motorcar, while the launch of a joint venture between Jimmy and Harry leaves Gordon simmering.

Following the Queen of Time unveiling accident, Harry recovers at his country home. However, keen to quash any retirement rumours, he returns to the store at the earliest possible moment intent on opening a cutting-edge technology department, and soon annoys Mae when he insists on a role for the Dolly Sisters at her first-ever fashion launch. Kitty is soul-searching after Connie's news gets around the store, while mysterious entrepreneur Jimmy Dillon starts to make his mark on Harry - not to mention Mae.

Harry and Lord Loxley clash in a dramatic confrontation. Princess Marie probes into the status of the Selfridge Estate. Gordon faces a big romantic decision.

Harry goes ahead with his plans for the estate, buying a field at auction - only to find there is an unexpected rival bidder. Henri continues to behave erratically.

It's 1928 and nine years on, retail magnate Harry is enjoying his time at the heart of the Roaring Twenties. In store, while about to unveil a new monument he receives a very special visitor - though a later accident places his role at the helm in jeopardy. Elsewhere, Mr Grove celebrates his birthday in the company of his now 19-year-old daughter Meryl, and store favourite Kitty Edwards is keen to show off her luxurious new abode - while her sister Connie has some exciting news.

Harry places Violette under house arrest after the police raid at Colleano’s.