Season 1
- 1Yellow Peril22 Jan 1968
- 2The Heights of Madness29 Jan 1968
- 3Checkpoint Charlies5 Feb 1968
- 4Holy Smoke12 Feb 1968
- 5Five in a Bed19 Feb 1968
- 6Tea or Coffin26 Feb 1968
After returning home from a world cruise, two bumbling, clueless best friends are accidentally recruited by MI5 and unwittingly dragged into a high-stakes world of international espionage and crime.