Sad news inspires Alan and Celia to have another wedding ceremony attended by all of their family and friends. Caroline whisks Kate off on a romantic weekend, but a disagreement threatens to end the relationship. Just as Gillian and Robbie are back on friendlier terms, a revelation from Judith changes everything.

Celia reluctantly introduces Alan to her sister, Muriel. Caroline is stunned to learn that Kate is pregnant and receives a further blow from John when he comes with news. A drunk Gillian shares a dark, sinister secret with Caroline.

A surprise visitor makes Alan's day. Caroline promises to keep Gillian's formidable secret, as long as she steers clear of Robbie. Kate's gesture at Alan and Celia's wedding stuns both Caroline and the crowd.