Spooks strives for realism but Kudos's other spy series, this time for kids, is more like the over-the-top James Bond adventures of old.

It's a hugely entertaining blend of comedy and thrills, school grammar and spy romp, up-to-the-minute while recalling 1960s series like the The Avengers.

Our heroes are three teenagers whose spy HQ is accessed through a broom closet in their inner-city comprehensive.

As well as outlandish world-domination plots and inventive dialogue, there's sparky dialogue that shows adult series like Torchwood a thing or two.

This new DVD release features the first five episodes from the first series along with documentary footage.

David Knights