With his wedding only days away and tensions running high, Dermot suffers some pre-wedding jitters and takes refuge in a cupboard. Cathy gives her mother a book on homosexuality, leading Agnes to wonder who in her family is gay.

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.