A disgruntled colleague threatens to expose a secret from Kate's past.

Kate discovers surprising news about Kristina and Amir's wedding.

With Lucy missing, a panic-stricken Kate and Rob call the police.

Kate's horrified to find Judy's sent Rob the CCTV footage. The sham marriage is imminent.

After Rob's surprise proposal Kate struggles to choose between her heart and her head.

Kate is forced to make an important personal decision. The team prepare to set up a sting.