Kat finally gets the answers she's been searching for these last 11 years. Time is running out for Dana, and Titus goes searching for Brendan.

Cast: Rosalind Eleazar, Ashley Walters, Amelie Dokubo, Geff Francis, Lisa Faulkner, Kieran Burton, Oscar Kennedy, Steve Pemberton, Felix Garcia Guyer, Richard Armitage, Charlie Hamblett, Catherine Ayers, Lenny Henry, Jo Martin, James Nesbitt, Cyril Nri, Brigid Zengeni, Jessica Plummer