Call the Midwife series 15 has reached its final episode, leaving fans wondering what lies ahead for the residents of Nonnatus House.

The BBC is broadcasting the Call the Midwife series 15 finale this evening, Sunday, March 8, drawing the curtain on the East End drama once again.

Numerous storylines required resolution ahead of the final chapter, so here's an overview of how Call the Midwife series 15 draws to a close.

Viewers have been anticipating for considerable time the moment when Rosalind (portrayed by Natalie Quarry) and Cyril (Zephryn Taitte) would achieve their happy conclusion, and fortunately, their moment arrived in the finale.

Accompanied by their cherished companions at Nonnatus House, the pair said their vows in a touching registry office service.

However, before departing for their new life together, they visited Sister Monica Joan's (Judy Parfitt) bedside, who accurately sensed that Rosalind was expecting.

The couple had been concealing the news from others, but Sister Monica Joan was quietly delighted and presented them with a teddy bear for their future baby.

At the start of the finale, Sister Monica Joan had ceased taking the medication prescribed for her chronic kidney disease, accepting that her final days were approaching.

She requested Bernie Mullucks (Chris Reilly) from the funeral parlour to visit her and arrange the preparations before her passing.

Prior to discussing specifics, Bernie wheeled the sister through the market in a wheelchair and towards the church, allowing her a final glimpse of these familiar surroundings.

Sister Monica Joan's condition deteriorated as she lay in bed, until she unexpectedly encountered the apparition of her departed friend Sister Evangelina (Pam Ferris), who tenderly accompanied her soul as the beloved nun passed away peacefully.

Mourners wept throughout the funeral service, yet honouring Sister Monica Joan's wishes, her coffin was transported to the church on a costermonger cart, symbolising her East End heritage.

Trixie Aylward (Helen George) revealed she had taken up the matron role at the Lady Emily Clinic, though Mr Scarisbrick (Richard Dillane) enquired whether she might consider entering into partnership with him.

With his semi-retirement approaching, Mr Scarisbrick proposed offering her 40 per cent of the Lady Emily, though she couldn't obtain the Aylward family finances as her husband's mother retained control.

Nevertheless, news emerges that his mother has suffered a fatal heart attack, prompting Trixie to arrange another meeting with her previous employer, informing him she now holds a position on the Aylward Estate board.

Yet Trixie declined the mere 40 per cent stake in the Lady Emily, demanding 55 per cent instead, ensuring absolute clarity regarding who held authority.

Sister Veronica (Rebecca Gethings) temporarily departed the Order earlier this series as she wished to become a mother and wanted to explore whether this might be achievable.

However, she is heartbroken to discover in the finale that her menopause has commenced, meaning having a child naturally is no longer possible.

This prompts Beryl to inform Geoffrey Franklin (Christopher Harper) that she is returning to the Order to resume her role as Sister Veronica once again.

She assures him that if she does return, at least she will be surrounded by children daily, even though she cannot have one herself.

The fate of Nonnatus House has remained uncertain for considerable time as the council resolved to shut down the clinic.

Dr Turner (Stephen McGann) was furious when the council attempted to remove much of the clinic's vital equipment prior to closure, but he refused to allow this until the clinic's final day.

Towards the finale's conclusion, Sister Julienne (Jenny Agutter) assembled everyone to announce that there would be some "alterations, not closure".

The sister disclosed that Nonnatus House would transition into a house of prayer and charity whilst they determined their next course of action.

Meanwhile, three prospective new medical missions would present themselves, each requiring at least a year overseas in Gilbert and Ellice Island, British Columbia and Australia.

She tells them, "We ask for your prayers and your patience, and that as many of you are able, stay with us on this journey. All will be well."

The finale concludes with a sign being hung on the Nonnatus House entrance stating "temporarily closed", suggesting this may not be the final chapter after all.

Call the Midwife is available to watch on BBC iPlayer.