All over Dublin, mothers are excitedly looking forward to seeing their loved ones return home for Christmas. But Agnes Brown is depressed. Her son Trevor is on the missions in Canada, and can't possibly afford to make it back. With Maria's posh mum Hillary pressing the newlyweds to spend Christmas at her place, Agnes decides to compete for their love by providing an even more lavish Christmas celebration than Hillary's - even if Buster is having trouble delivering the turkey.

Agnes Brown’s son, Dermot, and his new wife, Maria, have a baby on the way, and they are desperate for a place of their own, as the smash-hit comedy written by and starring Brendan O’Carroll continues. The newlyweds just can’t afford to move out, but Mrs Brown has a plan to help her son. Loving mother that she is, Agnes has promised the couple the money from Grandad’s life insurance policy payout for a deposit for their own home. There’s just one minor hitch – Grandad is not dead. Caught between a suspicious insurance company and her God-fearing son, Trevor, Agnes has to resort to desperate measures to keep Grandad out of sight and her dream alive.

There is bickering aplenty in the Brown household, as Rory and Dino are on the rocks and Agnes and Betty rub each other up the wrong way. With Maria about to give birth, Cathy convinces Agnes to build bridges and invite Maria's mother Hillary out for dinner. However, the night comes to an abrupt end when Maria goes into labour. Can the family get Maria to the hospital in time?

With the festive season fast approaching, Agnes Brown finds herself facing her busiest Christmas yet. Spiritual son Trevor is visiting from the missions, grandson Bono is sleeping over on Christmas Eve, and there are three new faces to feed on Christmas Day now that Agnes’s youngest son Dermot is the father of triplets. Visiting, priest Father Damien announces that the Finglas Nativity play has been cancelled. Agnes vows to stage a Nativity play of her own in the local community centre. She meets stiff resistance from Father Damien, who is wary of meddling mothers like Agnes and refuses to ask permission from the Bishop. Cathy is furious when she discovers that Agnes has been reading her mail and decides to play a prank on her interfering mother. Convinced that she has been entered into a ‘Best Christmas Mother’ competition, Agnes starts being unusually nice to everyone...

Agnes Brown has finally been given permission to stage her own Nativity play and is determined to put on the greatest show on Earth. The only thing standing in her way now is local priest Father Damien, who is insisting that Agnes makes some last-minute changes to her rather unusual script. Will Agnes ever get to play the Virgin Mary?

A hypnotist is booked to provide the entertainment at the triplets' baptism - and Agnes soon finds herself under his spell. Meanwhile, the matriarch's kitchen is falling apart - but that turns out to be the least of her problems when son Mark delivers some heartbreaking news.

Agnes is desperate for a holiday but cannot find anyone to look after Grandad. It seems her only option is to convince a health inspector that Grandad is losing his marbles. Sparks fly when Rory and Dino move into Mrs Brown's house, and Agnes' late husband Redser gets in touch from beyond the grave with some very ominous news...

Agnes is well-pleased with her state of the art remote-controlled Christmas tree - though less so with Buster's exploding crackers. She reluctantly agrees to help Mark and Betty by finding out what their son Bono wants from Santa before hosting the family's pre-Christmas party, which makes her very cross when nobody - especially Hillary - will play by the rules in her party games, as usual. Grandad's charades contribution turns out to be a mild heart attack but, after the guests have gone, he still has fun at Agnes's expense with the Christmas tree. Agnes resorts to desperate measures to discover what Bono wants from Santa - whose visit is not what she expected. However the whole family comes together for their Christmas Day musical finale.

Agnes prepares for her New Year's Eve party although half the guests have reasons for not coming to it. She is also perturbed that Mark and Betty want to send Bono to the very rough local school and is somewhat harassed when stern Father McBride persuades her to look after a parrot that belonged to Maria's recently deceased auntie. After having a mishap with some aerosol glue which she mistook for deodorant and accidentally bringing on Dino's food allergy Agnes learns that the parrot was living in a house of ill repute not unknown to Father McBride, a fact which comes...

After a spate of burglaries in Finglas, Agnes asks Buster Brady to fit a new alarm system.

Cathy has a new, French boyfriend. He doesn't make the best first impression, which might be an issue if he is to survive meeting Mrs Brown.

When a crime wave hits Finglas, Father Damien and Maria put together a neighbourhood watch scheme.

it's the festive season in the Brown household and Father Damian has organised a Christmas decoration contest. Agnes can't figure out how to use a gift from Buster. Cathy is up for promotion and Buster has a date.

Agnes's world is turned upside down when an angel arrives in Finglas and grants her a wish to see what life would be like if she had never been born.

It’s Christmas in Finglas, and Mrs Brown is coping with life after lockdown. As she gets news of a very special competition, Grandad, Winnie and Father Damien come to her for help.