A remarkable invention turns a nine-year-old boy named Joe into a secret agent with super-powers and plunges him into a sensational career.

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Main Cast: Len Jones, Rupert Davies, Keith Alexander, David Healy, Jeremy Wilkin, Gary Files, Sylvia Anderson

Directors: Desmond Saunders, Leo Eaton, Peter Anderson, Alan Perry

Writers: Tony Barwick, Shane Rimmer, Gerry Anderson, Sylvia Anderson

Editors: Harry MacDonald, Alan Killick

Cinematographers: Paddy Seale, Julien Lugrin

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