Guest Stars Matilda Ziegler as Christine Miller Danny Babington as SOCO Officer Claudie Blakley as Laetitia Gane Roger Allam as Simon Featherstonehaugh Clive Merrison as Geoffrey Cramond Tony Haygarth as Bob Tamworth Christine Kavanagh as Pippa Featherstonehaugh Hugh Sachs as Steve John Standing as Black Rod Sophie Bould as Penny James Pearse as Eric Ramsey Gawn Grainger as David Thompson Kevin Dignam as Owen Glyn Williams as Digicam Man Janet Dale as Marie Ramsey Garrick Hagon as Joseph Frady Pieter Lawman as Technician Richard Henders as Tim Sadler Bohdan Poraj as Martin David Mallinson as Peter Bellamy Uncredited Nick Turner as C.I.D.