I Spy Apocalypse

Summary

Tom's skills as leader are tested to their extremes when they take part in an Extreme Emergency Response Initiative Exercise (EERIE) to test their response to nuclear, chemical or biological act in central London, but when the power in the grid is cut and Harry starts to feel ill, they soon begin to suspect it's for real.

Guest stars

• Nicola Walker as Ruth Evershed
• Hugh Simon as Malcolm Wynn-Jones
• Rory MacGregor as Colin Wells
• Annabelle Apsion as Bridget Sands
• Jo Joyner as Stephanie Mills
• Natasha Little as Vicki Westbrook
• Richard Braine as Phil
• Marty Cruikshank as Dot
• Alastair Galbraith as John MacLeish
• James Holmes as Christopher John Jennings