When her sister announces she is getting engaged, Sara responds by trying to prove scientifically that love does not exist. Scared that the people she cares about are outgrowing her, Sara tries to befriend an anti-social fast food employee.

Sara decides to face up to her sadness about the past and bravely attempts to return her unused but tattered wedding dress to the shop where Craig jilted her 15 years ago.

Sara organises a baby show for Scoopy to prove she doesn't make everything about her and is visited by a ghostly reminder of her own pregnancy.

Sara is persuaded to go on a date, Carol is happily back with her awful ex, Sara tries to repair the damage she did to Marie.

Sara's father, Lewis, is back, forcing her to re-examine all her important male relationships. She tries to dig deeper into why Lewis and her fiancé both left her.

Sara dials up the drama on Lucy and Stefan's wedding day to distract from her own fears, which are only chemicals after all.