Barbara Machin Creator, Consulting Producer Trevor Eve Detective Superintendent Peter Boyd Actor Sue Johnston Dr. Grace Foley Actor Wil Johnson DI Spencer Jordan Actor Esther Hall Dr. Felix Gibson Actor Félicité Du Jeu DC Stella Goodman Actor Mark Lewis Jones Tom McQueen Guest Star David Calder Commander Bill Drake Guest Star Patricia Kerrigan Penny Coulter Guest Star Mark Letheren Toby Holmes Guest Star Dominic Rickhards Marcus Coulter Guest Star Nathalie Cox Jackie Holmes Guest Star Abhin Galeya Harry Guest Star Sadie Shimmin Commissioner Gale Sullivan Guest Star Sean Jackson Duty Constable Guest Star Geoffrey Towers Journalist No.1 Guest Star Rachel Gleaves Journalist No.2 Guest Star Brendan Charleson Prison Guard Guest Star Mark Killeen Male Lab Biosuit Guest Star Neil Burgess Male Paramedic Guest Star Richard Standeven Director Ed Whitmore Writer Richard Burrell Producer Sue Smith Associate Producer Patrick Spence Executive Producer Joseph Campbell Original Music Paul Hart Original Music Paul Bond Cinematographer Crispin Green Film Editor Julia Crampsie Casting Catherine Willis Casting Colin Monk Production Design Lucienne Suren Art Director Kerry Hirst Costume Design