Despite their rift, Cat and Cathy team up to help the Mums' attempt to get Callum to heal his rift with Angela. They lure Callum to a Northern Soul Revival where Marilyn is convinced the beating heart of the music will prove a powerful medicine.

It's a drama filled night that sees Cathy and Marcus's relationship tested again, and Tess come to the rescue in a life-or-death situation.

In the midst of all this, the siblings get the results of their Valentine's Day DNA tests which throw up more surprises, but none so big as Colin has in store for them as they commemorate the first anniversary of his sudden death.

Will they ever know all their late father's secrets?