Head should have been a proud moment not just for its stars (The Monkees and Victor Mature), or its director/co-writer (Bob Rafelson), but also its other co-writer (and brief cameo) Jack Nicholson. As it stands, most of them seem to shun it, and to outsiders the movie is regarded, at best, as a curio.

While the T.V. series was famously based on the antics of the Beatles' 'Help!', this film is also judged by the same accord. Yet far from the trite and painfully overrated Beatles films, and even the dated Monkees T.V. series, Head has a layer of depth. An undercurrent of man's darker nature is at work here, and while that may sound like a bizarre thing to say about a manufactured pop band, the use of certain themes and images (hitting women, laughing at cripples and real-life footage of a Vietcong POW shot dead at point-blank range) give the film an edge that many 'serious' films would not dare to aspire to.

There are also the fun moments, which range from James Bond parodies to 'Big Victor' and my personal favourite, Mickey Dolenz under beseige by Arab soldiers on horseback. (One of them turns to Mickey and hisses 'pssst!', only for the 'pssst!' to appear in subtitles!) The group are aware of their manufactured image in the film ('I'm the dummy, Mickey I'm always the dummy', claims Tork, neatly summing up his one-dimensional foil role of the series), meaning that their characters  they play 'themselves' acting and not-acting here  are opened out more, and consequently are less generic and irritating than they were in the series. This level of parody and self-awareness even takes on their fab-four origins, with subtler takes on the Maharishi and out-and-out acknowledgements with a waitress who asks: 'Well, if it isn't God's gift to the eight-year-olds are you still paying tribute to Ringo Starr?' Also listen out for Tork whistling 'Strawberry Fields Forever' while in the bathroom.

Then there are the songs, of course. Six of them here, slightly more psychedelic than usual, which may have alienated their fanbase, and even a Frank Zappa cameo wouldn't have turned on an adult audience to their charms at this point. Probably the best is the charming 'As We Go Along', though the first, a Carol King-penned 'Porpoise Song', interestingly talks of the desire to live while time is ticking remorselessly away and death gets ever nearer. On a lighter note, its refrain of 'the porpoise is laughing' seems to be a direct mickey-take of 'I am the Walrus'.

Constantly inventive with direct references to silent film and drug culture, perhaps Head's finest feature is its narrative structure. Not the only  but the most important  reason why it improves with multiple viewings, the story goes left, right, forwards, backwards, circular and through several levels of reality. In essence a series of sketches hung loosely together, its cohesion is tightened by the space-time defying plot which hangs its internal logic together by means of flashback, dream sequence, prison of the mind and remote control channel changer.

With a perfect beginning and end, this intelligently-written, knowing film was not what The Monkees' pre-teen audience was expecting and subsequently suffered a negative critical reception. Now those expectations have gone, this one is in dire need of serious reappraisal.

Sentiment: positive