Did you lose Downton Abbey in the British fog? Time to catch up

Well, dust off your jewels and put on the kettle because the twists and turns at your favourite Yorkshire estate in early 20th-century Britain are back with a feature film, to the delight of fans and Masterpiece, among others involved in creating the show.

"When we agreed to co-produce the television series we had no expectation that this was going to become a darling of the American audience," said Susanne Simpson, deputy executive producer for Masterpiece. "It was really a surprise to all of us."

So, what to do about all those delicious details that may have faded after the six-season, upstairs-downstairs series ended in 2015 in the United Kingdom and the following year in the United States? We've got you covered with this guide to Downton's past, but first a quick catch up on the cast.

Key aristocrats and their original actors are back, including the Crawleys, of course. Hugh Bonneville is Robert Crawley, the 7th Earl of Grantham, and Elizabeth McGovern is Cora, his countess. They have three daughters, including their eldest, the opinionated Lady Mary, played by Michelle Dockery.

Maggie Smith reprises her role as the wry matriarch Violet Crawley, Dowager Countess of Grantham. So does her frenemy, Isobel Crawley Grey, played by Penelope Wilton.

Below stairs, Joanne Froggatt remains Anna May Bates, lady's maid to Mary, and Brendan Coyle returns as her selfless hubby, John Bates.

There are newcomers on the big screen, but we'll get to that later.

The PBS series concludes on New Year's Eve, heading into 1926. The rich are selling off their estates in the crash and the middle class is ascending, but there's even bigger news: Anna procures a shiny silver electric hair dryer at Mary's request. You know, because progress. And it's a beaut. Daisy, the assistant cook, can't resist it, making a mess of her hair.

In other Anna news: She gives birth in Mary's bedroom, on New Year's Eve during Edith Crawley's wedding, no less, as the series winds down.

Sadly, Mr Carson (the estate's top dog as butler) has "the palsy", which did in the careers of his dad and granddad. He agrees to emeritus status, letting the villainous Thomas Barrow take over.

Leading up to her wedding, Lady Edith (the former spinster and one of Mary's sisters) is surprised at The Ritz by Bertie Pelham, who had previously broken her heart. The arrangements for them to meet were an act of rare kindness on the part of Mary for Edith after years of rocky rivalry between the two.

Pelham begs Edith's forgiveness before the show concludes with their nuptials. First, Edith comes clean about her daughter, Marigold, who was born out of wedlock, and fends off the initial "damaged goods" qualms of Bertie's judgy mother.

"Edith is going to be happy. Just think about that," gushes her American mom, Cora.

That's how Robert once summed up the Bateses. Before their happily ever after, with a brand new son, Anna and John had virtually no luck at all.

Anna was sexually abused by her stepfather and fought back with a knife - she only cut him - before arriving at Downton. John is an injured war hero (he uses a cane after taking shrapnel in one leg) who was Robert's soldier-servant during the second Boer War and saved Robert's life in an explosion. Robert repays the debt by employing John as his new valet, but John must withstand all manner of resistance from doubters on staff who think his disability makes him unsuitable for the job.

John's personal life was equally challenging. His horrid first wife, Vera, killed herself with arsenic and set it up to look like he murdered her. John was sent to prison for a long stretch but was later freed. He had already spent time in prison after taking the fall for Vera in a theft of regimental silver.

Specifically, 1924 wasn't kind to Anna and John.

Anna was attacked and raped by a visiting valet, Alex Green, but she tells only Mrs Hughes, the housekeeper. Green turns up dead after mysteriously being pushed or falling into traffic at Piccadilly Circus. Anna is charged after a witness reports seeing her near the body on the busy London road. Word also leaks of her earlier knife incident, with prosecutors planning to use that against her as evidence that she's capable of violence.

John is desperate to see Anna cleared. He falsely confesses to the murder as she awaits trial and then flees to Ireland. The two are eventually let off the hook and reunited.

The series spans 14 years, starting in 1912, and the dead sort of piled up. Let us honour some of them here.

Robert had no sons so his first cousin, James Crawley, was his presumptive heir. James' only son was Patrick, who was unofficially intended for Mary. James died and Patrick was presumed dead in the sinking of the Titanic at the beginning of the series.

That's how Matthew Crawley - a distant relative - became Robert's new heir. Matthew fell truly, madly, deeply for Mary, but Mary - being Mary - took her time over eight tumultuous years before she finally accepted his second marriage proposal. Matthew died in a car crash shortly after their son, George Crawley, was born in September 1921.

That made young George the presumptive heir. However, a letter found after Matthew's death has him leaving his half of the estate to Mary after he and Robert divvied it up.

Lady Sybil, the youngest daughter of Robert and Cora, died of complications after childbirth. That's how the former chauffer, Tom Branson, became a single father to their daughter Sybbie.

Shirley MacLaine played Martha Levinson, mother of Cora. Paul Giamatti was Harold Levinson, Cora's blunt-speaking playboy of a brother.

Theo James played the hunky Turkish diplomat Kemal Pamuk, who died while in bed with Mary during Season 1.

Iain Glen, who was Jorah Mormont on Game of Thrones, played newspaper mogul Richard Carlisle, a short-lived love interest of Mary. Richard E. Grant, Tim Pigott-Smith, there were oh so many more guests, but we'd need to write a book.