Guest Stars Louise Brealey as Cass Jessica Gunning as Jan Geoffrey McGivern as Uncle Geoff Penny Downie as Ellen Olivia Poulet as Alison Oliver Maltman as Mike Caius Luckyn-Malone as Young Andrew Sebastian Patterson as Young Stephen Clive Russell as Paul Richard Pepple as DS Howard Wayne Cater as Birdwatcher Madeleine Bowyer as Jo Mark Weinman as Carl Walters Craig Russell as Builder