by Tony Barwick
Caught in a freak storm a B107 bomber plane is forced down inside the Arctic Circle; three of its nuclear devices are recovered – but the fourth bomb is missing. Agent Joe 90 is given the brain patterns of specialist Doctor William Kelvin and then sent into the frozen wilderness to locate the deadly warhead...
Len Jones (Joe McClaine), Rupert Davies (Professor Ian 'Mac' McClaine), Keith Alexander (Sam Loover / Captain), David Healy (Shane Weston / Commander Kovac), Gary Files (Doctor William Kelvin / B107 Pilot / 1st Russian / Radio Voice), Sylvia Anderson (Mrs. Harris), Jeremy Wilkin (B107 Co-Pilot Hal / 2nd Russian)
Directed by Alan Perry
Produced by David Lane
Executive Producer Reg Hill
Created by Gerry and Sylvia Anderson
UK (ATV Midlands):
January 5th, 1969
*Featuring Joe 'Joe 90' McClaine, Professor Ian 'Mac' McClaine, Sam Loover and Shane Weston
*Working title: 'The Search'