The Secret Service S01E06 - Hole in One

When the G9 series of advance warning orbital satellites is sabotaged, the trail of evidence leads to General Brompton, to whom Unwin passes on false intelligence during a golf match. Harding spies on two of Brompton's henchmen, Kromer and Blake, and learns that the golf balls contain recording devices. The fate of the satellites depends on Unwin's success in scoring a hole in one.