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