The first series of 13 episodes tells of Will (John Shackley) and his cousin Henry (Jim Baker) who for fear of losing their independence as a result of the capping flee their English village home after meeting a 'vagrant' who tells them of the free men in the White Mountains of France. Along the way they are helped by another young man Jean-Paul or Beanpole (Ceri Steel) who then travels with them to their destination.
The second series follows Will's exploits within the city of the Masters as he attempts to gather information that will help to defeat them.
The playlist below contains all 25 episodes which should help you while away an afternoon or three or you can buy it here - Tripods - The Complete Series 1 & 2 [DVD]
Once you've finished you may also want to check out this little documentary on the series.